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-"checksum tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
-"checksum wait-timeout 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9f200f5b12eb75f8c1ed65abd4b2db8a6e1b138a20de009dacee265a2498f3f6"
-"checksum wasi 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b89c3ce4ce14bdc6fb6beaf9ec7928ca331de5df7e5ea278375642a2f478570d"
-"checksum winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "8093091eeb260906a183e6ae1abdba2ef5ef2257a21801128899c3fc699229c6"
-"checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/nix-rust/Cargo.toml b/nix-rust/Cargo.toml
deleted file mode 100644
index 1372e5a73..000000000
--- a/nix-rust/Cargo.toml
+++ /dev/null
@@ -1,23 +0,0 @@
-[package]
-name = "nix-rust"
-version = "0.1.0"
-authors = ["Eelco Dolstra <edolstra@gmail.com>"]
-edition = "2018"
-
-[lib]
-name = "nixrust"
-crate-type = ["cdylib"]
-
-[dependencies]
-libc = "0.2"
-#futures-preview = { version = "=0.3.0-alpha.19" }
-#hyper = "0.13.0-alpha.4"
-#http = "0.1"
-#tokio = { version = "0.2.0-alpha.6", default-features = false, features = ["rt-full"] }
-lazy_static = "1.4"
-#byteorder = "1.3"
-
-[dev-dependencies]
-hex = "0.3"
-assert_matches = "1.3"
-proptest = "0.9"
diff --git a/nix-rust/local.mk b/nix-rust/local.mk
deleted file mode 100644
index 538244594..000000000
--- a/nix-rust/local.mk
+++ /dev/null
@@ -1,48 +0,0 @@
-ifeq ($(OPTIMIZE), 1)
-  RUST_MODE = --release
-  RUST_DIR = release
-else
-  RUST_MODE =
-  RUST_DIR = debug
-endif
-
-libnixrust_PATH := $(d)/target/$(RUST_DIR)/libnixrust.$(SO_EXT)
-libnixrust_INSTALL_PATH := $(libdir)/libnixrust.$(SO_EXT)
-libnixrust_LDFLAGS_USE := -L$(d)/target/$(RUST_DIR) -lnixrust
-libnixrust_LDFLAGS_USE_INSTALLED := -L$(libdir) -lnixrust
-
-ifdef HOST_LINUX
-libnixrust_LDFLAGS_USE += -ldl
-libnixrust_LDFLAGS_USE_INSTALLED += -ldl
-endif
-
-ifdef HOST_DARWIN
-libnixrust_BUILD_FLAGS = NIX_LDFLAGS="-undefined dynamic_lookup"
-else
-libnixrust_LDFLAGS_USE += -Wl,-rpath,$(abspath $(d)/target/$(RUST_DIR))
-libnixrust_LDFLAGS_USE_INSTALLED += -Wl,-rpath,$(libdir)
-endif
-
-$(libnixrust_PATH): $(call rwildcard, $(d)/src, *.rs) $(d)/Cargo.toml
-	$(trace-gen) cd nix-rust && CARGO_HOME=$$(if [[ -d vendor ]]; then echo vendor; fi) \
-	$(libnixrust_BUILD_FLAGS) \
-	  cargo build $(RUST_MODE) $$(if [[ -d vendor ]]; then echo --offline; fi) \
-	&& touch target/$(RUST_DIR)/libnixrust.$(SO_EXT)
-
-$(libnixrust_INSTALL_PATH): $(libnixrust_PATH)
-	$(target-gen) cp $^ $@
-ifdef HOST_DARWIN
-	install_name_tool -id $@ $@
-endif
-
-clean: clean-rust
-
-clean-rust:
-	$(suppress) rm -rfv nix-rust/target
-
-ifndef HOST_DARWIN
-check: rust-tests
-
-rust-tests:
-	$(trace-test) cd nix-rust && CARGO_HOME=$$(if [[ -d vendor ]]; then echo vendor; fi) cargo test --release $$(if [[ -d vendor ]]; then echo --offline; fi)
-endif
diff --git a/nix-rust/src/c.rs b/nix-rust/src/c.rs
deleted file mode 100644
index c1358545f..000000000
--- a/nix-rust/src/c.rs
+++ /dev/null
@@ -1,77 +0,0 @@
-use super::{error, store::path, store::StorePath, util};
-
-#[no_mangle]
-pub unsafe extern "C" fn ffi_String_new(s: &str, out: *mut String) {
-    // FIXME: check whether 's' is valid UTF-8?
-    out.write(s.to_string())
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn ffi_String_drop(self_: *mut String) {
-    std::ptr::drop_in_place(self_);
-}
-
-#[no_mangle]
-pub extern "C" fn ffi_StorePath_new(
-    path: &str,
-    store_dir: &str,
-) -> Result<StorePath, error::CppException> {
-    StorePath::new(std::path::Path::new(path), std::path::Path::new(store_dir))
-        .map_err(|err| err.into())
-}
-
-#[no_mangle]
-pub extern "C" fn ffi_StorePath_new2(
-    hash: &[u8; crate::store::path::STORE_PATH_HASH_BYTES],
-    name: &str,
-) -> Result<StorePath, error::CppException> {
-    StorePath::from_parts(*hash, name).map_err(|err| err.into())
-}
-
-#[no_mangle]
-pub extern "C" fn ffi_StorePath_fromBaseName(
-    base_name: &str,
-) -> Result<StorePath, error::CppException> {
-    StorePath::new_from_base_name(base_name).map_err(|err| err.into())
-}
-
-#[no_mangle]
-pub unsafe extern "C" fn ffi_StorePath_drop(self_: *mut StorePath) {
-    std::ptr::drop_in_place(self_);
-}
-
-#[no_mangle]
-pub extern "C" fn ffi_StorePath_to_string(self_: &StorePath) -> Vec<u8> {
-    let mut buf = vec![0; path::STORE_PATH_HASH_CHARS + 1 + self_.name.name().len()];
-    util::base32::encode_into(self_.hash.hash(), &mut buf[0..path::STORE_PATH_HASH_CHARS]);
-    buf[path::STORE_PATH_HASH_CHARS] = b'-';
-    buf[path::STORE_PATH_HASH_CHARS + 1..].clone_from_slice(self_.name.name().as_bytes());
-    buf
-}
-
-#[no_mangle]
-pub extern "C" fn ffi_StorePath_less_than(a: &StorePath, b: &StorePath) -> bool {
-    a < b
-}
-
-#[no_mangle]
-pub extern "C" fn ffi_StorePath_eq(a: &StorePath, b: &StorePath) -> bool {
-    a == b
-}
-
-#[no_mangle]
-pub extern "C" fn ffi_StorePath_clone(self_: &StorePath) -> StorePath {
-    self_.clone()
-}
-
-#[no_mangle]
-pub extern "C" fn ffi_StorePath_name(self_: &StorePath) -> &str {
-    self_.name.name()
-}
-
-#[no_mangle]
-pub extern "C" fn ffi_StorePath_hash_data(
-    self_: &StorePath,
-) -> &[u8; crate::store::path::STORE_PATH_HASH_BYTES] {
-    self_.hash.hash()
-}
diff --git a/nix-rust/src/error.rs b/nix-rust/src/error.rs
deleted file mode 100644
index bb0c9a933..000000000
--- a/nix-rust/src/error.rs
+++ /dev/null
@@ -1,118 +0,0 @@
-use std::fmt;
-
-#[derive(Debug)]
-pub enum Error {
-    InvalidPath(crate::store::StorePath),
-    BadStorePath(std::path::PathBuf),
-    NotInStore(std::path::PathBuf),
-    BadNarInfo,
-    BadBase32,
-    StorePathNameEmpty,
-    StorePathNameTooLong,
-    BadStorePathName,
-    NarSizeFieldTooBig,
-    BadNarString,
-    BadNarPadding,
-    BadNarVersionMagic,
-    MissingNarOpenTag,
-    MissingNarCloseTag,
-    MissingNarField,
-    BadNarField(String),
-    BadExecutableField,
-    IOError(std::io::Error),
-    #[cfg(unused)]
-    HttpError(hyper::error::Error),
-    Misc(String),
-    #[cfg(not(test))]
-    Foreign(CppException),
-    BadTarFileMemberName(String),
-}
-
-impl From<std::io::Error> for Error {
-    fn from(err: std::io::Error) -> Self {
-        Error::IOError(err)
-    }
-}
-
-#[cfg(unused)]
-impl From<hyper::error::Error> for Error {
-    fn from(err: hyper::error::Error) -> Self {
-        Error::HttpError(err)
-    }
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match self {
-            Error::InvalidPath(_) => write!(f, "invalid path"),
-            Error::BadNarInfo => write!(f, ".narinfo file is corrupt"),
-            Error::BadStorePath(path) => write!(f, "path '{}' is not a store path", path.display()),
-            Error::NotInStore(path) => {
-                write!(f, "path '{}' is not in the Nix store", path.display())
-            }
-            Error::BadBase32 => write!(f, "invalid base32 string"),
-            Error::StorePathNameEmpty => write!(f, "store path name is empty"),
-            Error::StorePathNameTooLong => {
-                write!(f, "store path name is longer than 211 characters")
-            }
-            Error::BadStorePathName => write!(f, "store path name contains forbidden character"),
-            Error::NarSizeFieldTooBig => write!(f, "size field in NAR is too big"),
-            Error::BadNarString => write!(f, "NAR string is not valid UTF-8"),
-            Error::BadNarPadding => write!(f, "NAR padding is not zero"),
-            Error::BadNarVersionMagic => write!(f, "unsupported NAR version"),
-            Error::MissingNarOpenTag => write!(f, "NAR open tag is missing"),
-            Error::MissingNarCloseTag => write!(f, "NAR close tag is missing"),
-            Error::MissingNarField => write!(f, "expected NAR field is missing"),
-            Error::BadNarField(s) => write!(f, "unrecognized NAR field '{}'", s),
-            Error::BadExecutableField => write!(f, "bad 'executable' field in NAR"),
-            Error::IOError(err) => write!(f, "I/O error: {}", err),
-            #[cfg(unused)]
-            Error::HttpError(err) => write!(f, "HTTP error: {}", err),
-            #[cfg(not(test))]
-            Error::Foreign(_) => write!(f, "<C++ exception>"), // FIXME
-            Error::Misc(s) => write!(f, "{}", s),
-            Error::BadTarFileMemberName(s) => {
-                write!(f, "tar archive contains illegal file name '{}'", s)
-            }
-        }
-    }
-}
-
-#[cfg(not(test))]
-impl From<Error> for CppException {
-    fn from(err: Error) -> Self {
-        match err {
-            Error::Foreign(ex) => ex,
-            _ => CppException::new(&err.to_string()),
-        }
-    }
-}
-
-#[cfg(not(test))]
-#[repr(C)]
-#[derive(Debug)]
-pub struct CppException(*const libc::c_void); // == std::exception_ptr*
-
-#[cfg(not(test))]
-impl CppException {
-    fn new(s: &str) -> Self {
-        Self(unsafe { make_error(s) })
-    }
-}
-
-#[cfg(not(test))]
-impl Drop for CppException {
-    fn drop(&mut self) {
-        unsafe {
-            destroy_error(self.0);
-        }
-    }
-}
-
-#[cfg(not(test))]
-extern "C" {
-    #[allow(improper_ctypes)] // YOLO
-    fn make_error(s: &str) -> *const libc::c_void;
-
-    fn destroy_error(exc: *const libc::c_void);
-}
diff --git a/nix-rust/src/lib.rs b/nix-rust/src/lib.rs
deleted file mode 100644
index 101de106f..000000000
--- a/nix-rust/src/lib.rs
+++ /dev/null
@@ -1,10 +0,0 @@
-#[allow(improper_ctypes_definitions)]
-#[cfg(not(test))]
-mod c;
-mod error;
-#[cfg(unused)]
-mod nar;
-mod store;
-mod util;
-
-pub use error::Error;
diff --git a/nix-rust/src/nar.rs b/nix-rust/src/nar.rs
deleted file mode 100644
index cb520935e..000000000
--- a/nix-rust/src/nar.rs
+++ /dev/null
@@ -1,126 +0,0 @@
-use crate::Error;
-use byteorder::{LittleEndian, ReadBytesExt};
-use std::convert::TryFrom;
-use std::io::Read;
-
-pub fn parse<R: Read>(input: &mut R) -> Result<(), Error> {
-    if String::read(input)? != NAR_VERSION_MAGIC {
-        return Err(Error::BadNarVersionMagic);
-    }
-
-    parse_file(input)
-}
-
-const NAR_VERSION_MAGIC: &str = "nix-archive-1";
-
-fn parse_file<R: Read>(input: &mut R) -> Result<(), Error> {
-    if String::read(input)? != "(" {
-        return Err(Error::MissingNarOpenTag);
-    }
-
-    if String::read(input)? != "type" {
-        return Err(Error::MissingNarField);
-    }
-
-    match String::read(input)?.as_ref() {
-        "regular" => {
-            let mut _executable = false;
-            let mut tag = String::read(input)?;
-            if tag == "executable" {
-                _executable = true;
-                if String::read(input)? != "" {
-                    return Err(Error::BadExecutableField);
-                }
-                tag = String::read(input)?;
-            }
-            if tag != "contents" {
-                return Err(Error::MissingNarField);
-            }
-            let _contents = Vec::<u8>::read(input)?;
-            if String::read(input)? != ")" {
-                return Err(Error::MissingNarCloseTag);
-            }
-        }
-        "directory" => loop {
-            match String::read(input)?.as_ref() {
-                "entry" => {
-                    if String::read(input)? != "(" {
-                        return Err(Error::MissingNarOpenTag);
-                    }
-                    if String::read(input)? != "name" {
-                        return Err(Error::MissingNarField);
-                    }
-                    let _name = String::read(input)?;
-                    if String::read(input)? != "node" {
-                        return Err(Error::MissingNarField);
-                    }
-                    parse_file(input)?;
-                    let tag = String::read(input)?;
-                    if tag != ")" {
-                        return Err(Error::MissingNarCloseTag);
-                    }
-                }
-                ")" => break,
-                s => return Err(Error::BadNarField(s.into())),
-            }
-        },
-        "symlink" => {
-            if String::read(input)? != "target" {
-                return Err(Error::MissingNarField);
-            }
-            let _target = String::read(input)?;
-            if String::read(input)? != ")" {
-                return Err(Error::MissingNarCloseTag);
-            }
-        }
-        s => return Err(Error::BadNarField(s.into())),
-    }
-
-    Ok(())
-}
-
-trait Deserialize: Sized {
-    fn read<R: Read>(input: &mut R) -> Result<Self, Error>;
-}
-
-impl Deserialize for String {
-    fn read<R: Read>(input: &mut R) -> Result<Self, Error> {
-        let buf = Deserialize::read(input)?;
-        Ok(String::from_utf8(buf).map_err(|_| Error::BadNarString)?)
-    }
-}
-
-impl Deserialize for Vec<u8> {
-    fn read<R: Read>(input: &mut R) -> Result<Self, Error> {
-        let n: usize = Deserialize::read(input)?;
-        let mut buf = vec![0; n];
-        input.read_exact(&mut buf)?;
-        skip_padding(input, n)?;
-        Ok(buf)
-    }
-}
-
-fn skip_padding<R: Read>(input: &mut R, len: usize) -> Result<(), Error> {
-    if len % 8 != 0 {
-        let mut buf = [0; 8];
-        let buf = &mut buf[0..8 - (len % 8)];
-        input.read_exact(buf)?;
-        if !buf.iter().all(|b| *b == 0) {
-            return Err(Error::BadNarPadding);
-        }
-    }
-    Ok(())
-}
-
-impl Deserialize for u64 {
-    fn read<R: Read>(input: &mut R) -> Result<Self, Error> {
-        Ok(input.read_u64::<LittleEndian>()?)
-    }
-}
-
-impl Deserialize for usize {
-    fn read<R: Read>(input: &mut R) -> Result<Self, Error> {
-        let n: u64 = Deserialize::read(input)?;
-        Ok(usize::try_from(n).map_err(|_| Error::NarSizeFieldTooBig)?)
-    }
-}
diff --git a/nix-rust/src/store/binary_cache_store.rs b/nix-rust/src/store/binary_cache_store.rs
deleted file mode 100644
index 9e1e88b7c..000000000
--- a/nix-rust/src/store/binary_cache_store.rs
+++ /dev/null
@@ -1,48 +0,0 @@
-use super::{PathInfo, Store, StorePath};
-use crate::Error;
-use hyper::client::Client;
-
-pub struct BinaryCacheStore {
-    base_uri: String,
-    client: Client<hyper::client::HttpConnector, hyper::Body>,
-}
-
-impl BinaryCacheStore {
-    pub fn new(base_uri: String) -> Self {
-        Self {
-            base_uri,
-            client: Client::new(),
-        }
-    }
-}
-
-impl Store for BinaryCacheStore {
-    fn query_path_info(
-        &self,
-        path: &StorePath,
-    ) -> std::pin::Pin<Box<dyn std::future::Future<Output = Result<PathInfo, Error>> + Send>> {
-        let uri = format!("{}/{}.narinfo", self.base_uri.clone(), path.hash);
-        let path = path.clone();
-        let client = self.client.clone();
-        let store_dir = self.store_dir().to_string();
-
-        Box::pin(async move {
-            let response = client.get(uri.parse::<hyper::Uri>().unwrap()).await?;
-
-            if response.status() == hyper::StatusCode::NOT_FOUND
-                || response.status() == hyper::StatusCode::FORBIDDEN
-            {
-                return Err(Error::InvalidPath(path));
-            }
-
-            let mut body = response.into_body();
-
-            let mut bytes = Vec::new();
-            while let Some(next) = body.next().await {
-                bytes.extend(next?);
-            }
-
-            PathInfo::parse_nar_info(std::str::from_utf8(&bytes).unwrap(), &store_dir)
-        })
-    }
-}
diff --git a/nix-rust/src/store/mod.rs b/nix-rust/src/store/mod.rs
deleted file mode 100644
index da972482c..000000000
--- a/nix-rust/src/store/mod.rs
+++ /dev/null
@@ -1,17 +0,0 @@
-pub mod path;
-
-#[cfg(unused)]
-mod binary_cache_store;
-#[cfg(unused)]
-mod path_info;
-#[cfg(unused)]
-mod store;
-
-pub use path::{StorePath, StorePathHash, StorePathName};
-
-#[cfg(unused)]
-pub use binary_cache_store::BinaryCacheStore;
-#[cfg(unused)]
-pub use path_info::PathInfo;
-#[cfg(unused)]
-pub use store::Store;
diff --git a/nix-rust/src/store/path.rs b/nix-rust/src/store/path.rs
deleted file mode 100644
index 99f7a1f18..000000000
--- a/nix-rust/src/store/path.rs
+++ /dev/null
@@ -1,224 +0,0 @@
-use crate::error::Error;
-use crate::util::base32;
-use std::fmt;
-use std::path::Path;
-
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug)]
-pub struct StorePath {
-    pub hash: StorePathHash,
-    pub name: StorePathName,
-}
-
-pub const STORE_PATH_HASH_BYTES: usize = 20;
-pub const STORE_PATH_HASH_CHARS: usize = 32;
-
-impl StorePath {
-    pub fn new(path: &Path, store_dir: &Path) -> Result<Self, Error> {
-        if path.parent() != Some(store_dir) {
-            return Err(Error::NotInStore(path.into()));
-        }
-        Self::new_from_base_name(
-            path.file_name()
-                .ok_or_else(|| Error::BadStorePath(path.into()))?
-                .to_str()
-                .ok_or_else(|| Error::BadStorePath(path.into()))?,
-        )
-    }
-
-    pub fn from_parts(hash: [u8; STORE_PATH_HASH_BYTES], name: &str) -> Result<Self, Error> {
-        Ok(StorePath {
-            hash: StorePathHash(hash),
-            name: StorePathName::new(name)?,
-        })
-    }
-
-    pub fn new_from_base_name(base_name: &str) -> Result<Self, Error> {
-        if base_name.len() < STORE_PATH_HASH_CHARS + 1
-            || base_name.as_bytes()[STORE_PATH_HASH_CHARS] != b'-'
-        {
-            return Err(Error::BadStorePath(base_name.into()));
-        }
-
-        Ok(StorePath {
-            hash: StorePathHash::new(&base_name[0..STORE_PATH_HASH_CHARS])?,
-            name: StorePathName::new(&base_name[STORE_PATH_HASH_CHARS + 1..])?,
-        })
-    }
-}
-
-impl fmt::Display for StorePath {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}-{}", self.hash, self.name)
-    }
-}
-
-#[derive(Clone, PartialEq, Eq, Debug)]
-pub struct StorePathHash([u8; STORE_PATH_HASH_BYTES]);
-
-impl StorePathHash {
-    pub fn new(s: &str) -> Result<Self, Error> {
-        assert_eq!(s.len(), STORE_PATH_HASH_CHARS);
-        let v = base32::decode(s)?;
-        assert_eq!(v.len(), STORE_PATH_HASH_BYTES);
-        let mut bytes: [u8; 20] = Default::default();
-        bytes.copy_from_slice(&v[0..STORE_PATH_HASH_BYTES]);
-        Ok(Self(bytes))
-    }
-
-    pub fn hash(&self) -> &[u8; STORE_PATH_HASH_BYTES] {
-        &self.0
-    }
-}
-
-impl fmt::Display for StorePathHash {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        let mut buf = vec![0; STORE_PATH_HASH_CHARS];
-        base32::encode_into(&self.0, &mut buf);
-        f.write_str(std::str::from_utf8(&buf).unwrap())
-    }
-}
-
-impl Ord for StorePathHash {
-    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
-        // Historically we've sorted store paths by their base32
-        // serialization, but our base32 encodes bytes in reverse
-        // order. So compare them in reverse order as well.
-        self.0.iter().rev().cmp(other.0.iter().rev())
-    }
-}
-
-impl PartialOrd for StorePathHash {
-    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
-        Some(self.cmp(other))
-    }
-}
-
-#[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Debug)]
-pub struct StorePathName(String);
-
-impl StorePathName {
-    pub fn new(s: &str) -> Result<Self, Error> {
-        if s.is_empty() {
-            return Err(Error::StorePathNameEmpty);
-        }
-
-        if s.len() > 211 {
-            return Err(Error::StorePathNameTooLong);
-        }
-
-        let is_good_path_name = s.chars().all(|c| {
-            c.is_ascii_alphabetic()
-                || c.is_ascii_digit()
-                || c == '+'
-                || c == '-'
-                || c == '.'
-                || c == '_'
-                || c == '?'
-                || c == '='
-        });
-        if s.starts_with('.') || !is_good_path_name {
-            return Err(Error::BadStorePathName);
-        }
-
-        Ok(Self(s.to_string()))
-    }
-
-    pub fn name(&self) -> &str {
-        &self.0
-    }
-}
-
-impl fmt::Display for StorePathName {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.write_str(&self.0)
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use assert_matches::assert_matches;
-
-    #[test]
-    fn test_parse() {
-        let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-konsole-18.12.3";
-        let p = StorePath::new_from_base_name(&s).unwrap();
-        assert_eq!(p.name.0, "konsole-18.12.3");
-        assert_eq!(
-            p.hash.0,
-            [
-                0x9f, 0x76, 0x49, 0x20, 0xf6, 0x5d, 0xe9, 0x71, 0xc4, 0xca, 0x46, 0x21, 0xab, 0xff,
-                0x9b, 0x44, 0xef, 0x87, 0x0f, 0x3c
-            ]
-        );
-    }
-
-    #[test]
-    fn test_no_name() {
-        let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-";
-        assert_matches!(
-            StorePath::new_from_base_name(&s),
-            Err(Error::StorePathNameEmpty)
-        );
-    }
-
-    #[test]
-    fn test_no_dash() {
-        let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz";
-        assert_matches!(
-            StorePath::new_from_base_name(&s),
-            Err(Error::BadStorePath(_))
-        );
-    }
-
-    #[test]
-    fn test_short_hash() {
-        let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxl-konsole-18.12.3";
-        assert_matches!(
-            StorePath::new_from_base_name(&s),
-            Err(Error::BadStorePath(_))
-        );
-    }
-
-    #[test]
-    fn test_invalid_hash() {
-        let s = "7h7qgvs4kgzsn8e6rb273saxyqh4jxlz-konsole-18.12.3";
-        assert_matches!(StorePath::new_from_base_name(&s), Err(Error::BadBase32));
-    }
-
-    #[test]
-    fn test_long_name() {
-        let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
-        assert_matches!(StorePath::new_from_base_name(&s), Ok(_));
-    }
-
-    #[test]
-    fn test_too_long_name() {
-        let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
-        assert_matches!(
-            StorePath::new_from_base_name(&s),
-            Err(Error::StorePathNameTooLong)
-        );
-    }
-
-    #[test]
-    fn test_bad_name() {
-        let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-foo bar";
-        assert_matches!(
-            StorePath::new_from_base_name(&s),
-            Err(Error::BadStorePathName)
-        );
-
-        let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-kónsole";
-        assert_matches!(
-            StorePath::new_from_base_name(&s),
-            Err(Error::BadStorePathName)
-        );
-    }
-
-    #[test]
-    fn test_roundtrip() {
-        let s = "7h7qgvs4kgzsn8a6rb273saxyqh4jxlz-konsole-18.12.3";
-        assert_eq!(StorePath::new_from_base_name(&s).unwrap().to_string(), s);
-    }
-}
diff --git a/nix-rust/src/store/path_info.rs b/nix-rust/src/store/path_info.rs
deleted file mode 100644
index c2903ed29..000000000
--- a/nix-rust/src/store/path_info.rs
+++ /dev/null
@@ -1,70 +0,0 @@
-use crate::store::StorePath;
-use crate::Error;
-use std::collections::BTreeSet;
-
-#[derive(Clone, Debug)]
-pub struct PathInfo {
-    pub path: StorePath,
-    pub references: BTreeSet<StorePath>,
-    pub nar_size: u64,
-    pub deriver: Option<StorePath>,
-
-    // Additional binary cache info.
-    pub url: Option<String>,
-    pub compression: Option<String>,
-    pub file_size: Option<u64>,
-}
-
-impl PathInfo {
-    pub fn parse_nar_info(nar_info: &str, store_dir: &str) -> Result<Self, Error> {
-        let mut path = None;
-        let mut references = BTreeSet::new();
-        let mut nar_size = None;
-        let mut deriver = None;
-        let mut url = None;
-        let mut compression = None;
-        let mut file_size = None;
-
-        for line in nar_info.lines() {
-            let colon = line.find(':').ok_or(Error::BadNarInfo)?;
-
-            let (name, value) = line.split_at(colon);
-
-            if !value.starts_with(": ") {
-                return Err(Error::BadNarInfo);
-            }
-
-            let value = &value[2..];
-
-            if name == "StorePath" {
-                path = Some(StorePath::new(std::path::Path::new(value), store_dir)?);
-            } else if name == "NarSize" {
-                nar_size = Some(u64::from_str_radix(value, 10).map_err(|_| Error::BadNarInfo)?);
-            } else if name == "References" {
-                if !value.is_empty() {
-                    for r in value.split(' ') {
-                        references.insert(StorePath::new_from_base_name(r)?);
-                    }
-                }
-            } else if name == "Deriver" {
-                deriver = Some(StorePath::new_from_base_name(value)?);
-            } else if name == "URL" {
-                url = Some(value.into());
-            } else if name == "Compression" {
-                compression = Some(value.into());
-            } else if name == "FileSize" {
-                file_size = Some(u64::from_str_radix(value, 10).map_err(|_| Error::BadNarInfo)?);
-            }
-        }
-
-        Ok(PathInfo {
-            path: path.ok_or(Error::BadNarInfo)?,
-            references,
-            nar_size: nar_size.ok_or(Error::BadNarInfo)?,
-            deriver,
-            url: Some(url.ok_or(Error::BadNarInfo)?),
-            compression,
-            file_size,
-        })
-    }
-}
diff --git a/nix-rust/src/store/store.rs b/nix-rust/src/store/store.rs
deleted file mode 100644
index c33dc4a90..000000000
--- a/nix-rust/src/store/store.rs
+++ /dev/null
@@ -1,53 +0,0 @@
-use super::{PathInfo, StorePath};
-use crate::Error;
-use std::collections::{BTreeMap, BTreeSet};
-use std::path::Path;
-
-pub trait Store: Send + Sync {
-    fn store_dir(&self) -> &str {
-        "/nix/store"
-    }
-
-    fn query_path_info(
-        &self,
-        store_path: &StorePath,
-    ) -> std::pin::Pin<Box<dyn std::future::Future<Output = Result<PathInfo, Error>> + Send>>;
-}
-
-impl dyn Store {
-    pub fn parse_store_path(&self, path: &Path) -> Result<StorePath, Error> {
-        StorePath::new(path, self.store_dir())
-    }
-
-    pub async fn compute_path_closure(
-        &self,
-        roots: BTreeSet<StorePath>,
-    ) -> Result<BTreeMap<StorePath, PathInfo>, Error> {
-        let mut done = BTreeSet::new();
-        let mut result = BTreeMap::new();
-        let mut pending = vec![];
-
-        for root in roots {
-            pending.push(self.query_path_info(&root));
-            done.insert(root);
-        }
-
-        while !pending.is_empty() {
-            let (info, _, remaining) = futures::future::select_all(pending).await;
-            pending = remaining;
-
-            let info = info?;
-
-            for path in &info.references {
-                if !done.contains(path) {
-                    pending.push(self.query_path_info(&path));
-                    done.insert(path.clone());
-                }
-            }
-
-            result.insert(info.path.clone(), info);
-        }
-
-        Ok(result)
-    }
-}
diff --git a/nix-rust/src/util/base32.rs b/nix-rust/src/util/base32.rs
deleted file mode 100644
index 7e71dc920..000000000
--- a/nix-rust/src/util/base32.rs
+++ /dev/null
@@ -1,160 +0,0 @@
-use crate::error::Error;
-use lazy_static::lazy_static;
-
-pub fn encoded_len(input_len: usize) -> usize {
-    if input_len == 0 {
-        0
-    } else {
-        (input_len * 8 - 1) / 5 + 1
-    }
-}
-
-pub fn decoded_len(input_len: usize) -> usize {
-    input_len * 5 / 8
-}
-
-static BASE32_CHARS: &[u8; 32] = &b"0123456789abcdfghijklmnpqrsvwxyz";
-
-lazy_static! {
-    static ref BASE32_CHARS_REVERSE: Box<[u8; 256]> = {
-        let mut xs = [0xffu8; 256];
-        for (n, c) in BASE32_CHARS.iter().enumerate() {
-            xs[*c as usize] = n as u8;
-        }
-        Box::new(xs)
-    };
-}
-
-pub fn encode(input: &[u8]) -> String {
-    let mut buf = vec![0; encoded_len(input.len())];
-    encode_into(input, &mut buf);
-    std::str::from_utf8(&buf).unwrap().to_string()
-}
-
-pub fn encode_into(input: &[u8], output: &mut [u8]) {
-    let len = encoded_len(input.len());
-    assert_eq!(len, output.len());
-
-    let mut nr_bits_left: usize = 0;
-    let mut bits_left: u16 = 0;
-    let mut pos = len;
-
-    for b in input {
-        bits_left |= (*b as u16) << nr_bits_left;
-        nr_bits_left += 8;
-        while nr_bits_left > 5 {
-            output[pos - 1] = BASE32_CHARS[(bits_left & 0x1f) as usize];
-            pos -= 1;
-            bits_left >>= 5;
-            nr_bits_left -= 5;
-        }
-    }
-
-    if nr_bits_left > 0 {
-        output[pos - 1] = BASE32_CHARS[(bits_left & 0x1f) as usize];
-        pos -= 1;
-    }
-
-    assert_eq!(pos, 0);
-}
-
-pub fn decode(input: &str) -> Result<Vec<u8>, crate::Error> {
-    let mut res = Vec::with_capacity(decoded_len(input.len()));
-
-    let mut nr_bits_left: usize = 0;
-    let mut bits_left: u16 = 0;
-
-    for c in input.chars().rev() {
-        let b = BASE32_CHARS_REVERSE[c as usize];
-        if b == 0xff {
-            return Err(Error::BadBase32);
-        }
-        bits_left |= (b as u16) << nr_bits_left;
-        nr_bits_left += 5;
-        if nr_bits_left >= 8 {
-            res.push((bits_left & 0xff) as u8);
-            bits_left >>= 8;
-            nr_bits_left -= 8;
-        }
-    }
-
-    if nr_bits_left > 0 && bits_left != 0 {
-        return Err(Error::BadBase32);
-    }
-
-    Ok(res)
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use assert_matches::assert_matches;
-    use hex;
-    use proptest::proptest;
-
-    #[test]
-    fn test_encode() {
-        assert_eq!(encode(&[]), "");
-
-        assert_eq!(
-            encode(&hex::decode("0839703786356bca59b0f4a32987eb2e6de43ae8").unwrap()),
-            "x0xf8v9fxf3jk8zln1cwlsrmhqvp0f88"
-        );
-
-        assert_eq!(
-            encode(
-                &hex::decode("ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad")
-                    .unwrap()
-            ),
-            "1b8m03r63zqhnjf7l5wnldhh7c134ap5vpj0850ymkq1iyzicy5s"
-        );
-
-        assert_eq!(
-            encode(
-                &hex::decode("ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f")
-                    .unwrap()
-            ),
-            "2gs8k559z4rlahfx0y688s49m2vvszylcikrfinm30ly9rak69236nkam5ydvly1ai7xac99vxfc4ii84hawjbk876blyk1jfhkbbyx"
-        );
-    }
-
-    #[test]
-    fn test_decode() {
-        assert_eq!(hex::encode(decode("").unwrap()), "");
-
-        assert_eq!(
-            hex::encode(decode("x0xf8v9fxf3jk8zln1cwlsrmhqvp0f88").unwrap()),
-            "0839703786356bca59b0f4a32987eb2e6de43ae8"
-        );
-
-        assert_eq!(
-            hex::encode(decode("1b8m03r63zqhnjf7l5wnldhh7c134ap5vpj0850ymkq1iyzicy5s").unwrap()),
-            "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad"
-        );
-
-        assert_eq!(
-            hex::encode(decode("2gs8k559z4rlahfx0y688s49m2vvszylcikrfinm30ly9rak69236nkam5ydvly1ai7xac99vxfc4ii84hawjbk876blyk1jfhkbbyx").unwrap()),
-            "ddaf35a193617abacc417349ae20413112e6fa4e89a97ea20a9eeee64b55d39a2192992a274fc1a836ba3c23a3feebbd454d4423643ce80e2a9ac94fa54ca49f"
-        );
-
-        assert_matches!(
-            decode("xoxf8v9fxf3jk8zln1cwlsrmhqvp0f88"),
-            Err(Error::BadBase32)
-        );
-        assert_matches!(
-            decode("2b8m03r63zqhnjf7l5wnldhh7c134ap5vpj0850ymkq1iyzicy5s"),
-            Err(Error::BadBase32)
-        );
-        assert_matches!(decode("2"), Err(Error::BadBase32));
-        assert_matches!(decode("2gs"), Err(Error::BadBase32));
-        assert_matches!(decode("2gs8"), Err(Error::BadBase32));
-    }
-
-    proptest! {
-
-        #[test]
-        fn roundtrip(s: Vec<u8>) {
-            assert_eq!(s, decode(&encode(&s)).unwrap());
-        }
-    }
-}
diff --git a/nix-rust/src/util/mod.rs b/nix-rust/src/util/mod.rs
deleted file mode 100644
index eaad9d406..000000000
--- a/nix-rust/src/util/mod.rs
+++ /dev/null
@@ -1 +0,0 @@
-pub mod base32;