packaging: rename nixexpr -> lixexpr and so on

This breaks downstreams linking to us on purpose to make sure that if
someone is linking to Lix they're doing it on purpose and crucially not
mixing up Nix and Lix versions in compatibility code.

We still need to fix the internal includes to follow the same schema so
we can drop the single-level include system entirely. However, this
requires a little more effort.

This adds pkg-config for libfetchers and config.h.

Migration path:
expr.hh      -> lix/libexpr/expr.hh
nix/config.h -> lix/config.h

To apply this migration automatically, remove all `<nix/>` from
includes, so: `#include <nix/expr.hh>` -> `#include <expr.hh>`. Then,
the correct paths will be resolved from the tangled mess, and the
clang-tidy automated fix will work.

Then run the following for out of tree projects:

```
lix_root=$HOME/lix
(cd $lix_root/clang-tidy && nix develop -c 'meson setup build && ninja -C build')
run-clang-tidy -checks='-*,lix-fixincludes' -load=$lix_root/clang-tidy/build/liblix-clang-tidy.so -p build/ -fix src
```

Related: https://git.lix.systems/lix-project/nix-eval-jobs/pulls/5
Fixes: https://git.lix.systems/lix-project/lix/issues/279
Change-Id: I7498e903afa6850a731ef8ce77a70da6b2b46966

26 files changed, 181 insertions, 77 deletions

diff --git a/doc/manual/rl-next/rename-lixexpr.md b/doc/manual/rl-next/rename-lixexpr.md
new file mode 100644
index 000000000..698553c7f
--- /dev/null
+++ b/doc/manual/rl-next/rename-lixexpr.md
@@ -0,0 +1,31 @@
+---
+synopsis: Rename all the libraries nixexpr, nixstore, etc to lixexpr, lixstore, etc
+credits: jade
+category: Breaking Changes
+---
+
+The Lix C++ API libraries have had the following changes:
+- Includes moved from `include/nix/` to `include/lix/`
+- `pkg-config` files renamed from `nix-expr` to `lix-expr` and so on.
+- Libraries renamed from `libnixexpr.so` to `liblixexpr.so` and so on.
+
+There are other changes between Nix 2.18 and Lix, since these APIs are not
+stable. However, this change in particular is a deliberate compatibility break
+to force downstreams linking to Lix to specifically handle Lix and avoid Lix
+accidentally getting ensnared in compatibility code for newer CppNix.
+
+Migration path:
+
+- expr.hh      -> lix/libexpr/expr.hh
+- nix/config.h -> lix/config.h
+
+To apply this migration automatically, remove all `<nix/>` from includes, so `#include <nix/expr.hh>` -> `#include <expr.hh>`.
+Then, the correct paths will be resolved from the tangled mess, and the clang-tidy automated fix will work.
+
+Then run the following for out of tree projects:
+
+```console
+lix_root=$HOME/lix
+(cd $lix_root/clang-tidy && nix develop -c 'meson setup build && ninja -C build')
+run-clang-tidy -checks='-*,lix-fixincludes' -load=$lix_root/clang-tidy/build/liblix-clang-tidy.so -p build/ -fix src
+```
diff --git a/doc/manual/src/contributing/hacking.md b/doc/manual/src/contributing/hacking.md
index a8591e7ca..a73d672d4 100644
--- a/doc/manual/src/contributing/hacking.md
+++ b/doc/manual/src/contributing/hacking.md
@@ -102,14 +102,14 @@ $ meson compile -C build nixexpr
 All targets may be addressed as their output, relative to the build directory, e.g.:
 
 ```bash
-$ meson compile -C build src/libexpr/libnixexpr.so
+$ meson compile -C build src/libexpr/liblixexpr.so
 ```
 
 But Meson does not consider intermediate files like object files targets.
 To build a specific object file, use Ninja directly and specify the output file relative to the build directory:
 
 ```bash
-$ ninja -C build src/libexpr/libnixexpr.so.p/nixexpr.cc.o
+$ ninja -C build src/libexpr/liblixexpr.so.p/nixexpr.cc.o
 ```
 
 To inspect the canonical source of truth on what the state of the buildsystem configuration is, use:
diff --git a/meson.build b/meson.build
index 5885905c5..0d59ff751 100644
--- a/meson.build
+++ b/meson.build
@@ -395,7 +395,21 @@ config_h = configure_file(
   output : 'config.h',
 )
 
-install_headers(config_h, subdir : 'nix')
+install_headers(config_h, subdir : 'lix')
+
+# FIXME: not using the pkg-config module because it creates way too many deps
+# while meson migration is in progress, and we want to not include boost here
+configure_file(
+  input : 'src/lix-base.pc.in',
+  output : 'lix-base.pc',
+  install_dir : libdir / 'pkgconfig',
+  configuration : {
+    'prefix' : prefix,
+    'libdir' : libdir,
+    'includedir' : includedir,
+    'PACKAGE_VERSION' : meson.project_version(),
+  },
+)
 
 add_project_arguments(
   # TODO(Qyriad): Yes this is how the autoconf+Make system did it.
diff --git a/meson/cleanup-install.bash b/meson/cleanup-install.bash
index 3e229cbc6..928edc74a 100755
--- a/meson/cleanup-install.bash
+++ b/meson/cleanup-install.bash
@@ -47,4 +47,4 @@ fi
 
 # Intentionally not using -f.
 # If these files don't exist then our assumptions have been violated and we should fail.
-rm -v "$includedir/nix/parser-tab.cc" "$includedir/nix/lexer-tab.cc"
+rm -v "$includedir/lix/libexpr/parser-tab.cc" "$includedir/lix/libexpr/lexer-tab.cc"
diff --git a/package.nix b/package.nix
index be3bcfb35..ebafa9420 100644
--- a/package.nix
+++ b/package.nix
@@ -49,7 +49,7 @@
   # internal fork of nix-doc providing :doc in the repl
   lix-doc ? __forDefaults.lix-doc,
 
-  pname ? "nix",
+  pname ? "lix",
   versionSuffix ? "",
   officialRelease ? false,
   # Set to true to build the release notes for the next release.
@@ -333,7 +333,7 @@ stdenv.mkDerivation (finalAttrs: {
       echo "file binary-dist $out/bin/nix" >> $out/nix-support/hydra-build-products
     ''
     + lib.optionalString stdenv.isDarwin ''
-      for lib in libnixutil.dylib libnixexpr.dylib; do
+      for lib in liblixutil.dylib liblixexpr.dylib; do
         install_name_tool \
           -change "${lib.getLib boost}/lib/libboost_context.dylib" \
           "$out/lib/libboost_context.dylib" \
diff --git a/perl/lib/Nix/meson.build b/perl/lib/Nix/meson.build
index 6810622e3..1d235b74c 100644
--- a/perl/lib/Nix/meson.build
+++ b/perl/lib/Nix/meson.build
@@ -27,7 +27,7 @@ perl_libstore = shared_module(
   ],
   link_args : [
     # Nix doesn't provide a pkg-config file for libutil.
-    '-lnixutil',
+    '-llixutil',
     soname_args,
   ],
   install : true,
diff --git a/perl/meson.build b/perl/meson.build
index 75c7c2c79..4b179da8f 100644
--- a/perl/meson.build
+++ b/perl/meson.build
@@ -64,6 +64,6 @@ if cxx.get_linker_id() in ['ld.bfd', 'ld.gold']
   add_project_link_arguments('-Wl,--no-copy-dt-needed-entries', language : 'cpp')
 endif
 
-libstore = dependency('nixstore', 'nix-store', required : true)
+libstore = dependency('lixstore', 'lix-store', required : true)
 
 subdir('lib/Nix')
diff --git a/src/libcmd/lix-cmd.pc.in b/src/libcmd/lix-cmd.pc.in
new file mode 100644
index 000000000..f2e3f9d5e
--- /dev/null
+++ b/src/libcmd/lix-cmd.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: Lix (libcmd)
+Description: Lix Package Manager (libcmd)
+Version: @PACKAGE_VERSION@
+Requires: lix-base lix-util
+Libs: -L${libdir} -llixcmd
+Cflags: -I${includedir}/lix/libcmd
diff --git a/src/libcmd/meson.build b/src/libcmd/meson.build
index 5a0e61503..4da1b496b 100644
--- a/src/libcmd/meson.build
+++ b/src/libcmd/meson.build
@@ -39,7 +39,7 @@ libcmd_generated_headers = [
 ]
 
 libcmd = library(
-  'nixcmd',
+  'lixcmd',
   libcmd_generated_headers,
   libcmd_sources,
   dependencies : [
@@ -59,13 +59,13 @@ libcmd = library(
   install_rpath : libdir,
 )
 
-install_headers(libcmd_headers, subdir : 'nix', preserve_path : true)
+install_headers(libcmd_headers, subdir : 'lix/libcmd', preserve_path : true)
 custom_target(
   command : [ 'cp', '@INPUT@', '@OUTPUT@' ],
   input : libcmd_generated_headers,
   output : '@PLAINNAME@',
   install : true,
-  install_dir : includedir / 'nix',
+  install_dir : includedir / 'lix/libcmd',
 )
 
 liblixcmd = declare_dependency(
@@ -76,8 +76,8 @@ liblixcmd = declare_dependency(
 # FIXME: not using the pkg-config module because it creates way too many deps
 # while meson migration is in progress, and we want to not include boost here
 configure_file(
-  input : 'nix-cmd.pc.in',
-  output : 'nix-cmd.pc',
+  input : 'lix-cmd.pc.in',
+  output : 'lix-cmd.pc',
   install_dir : libdir / 'pkgconfig',
   configuration : {
     'prefix' : prefix,
diff --git a/src/libcmd/nix-cmd.pc.in b/src/libcmd/nix-cmd.pc.in
deleted file mode 100644
index 39575f222..000000000
--- a/src/libcmd/nix-cmd.pc.in
+++ /dev/null
@@ -1,9 +0,0 @@
-prefix=@prefix@
-libdir=@libdir@
-includedir=@includedir@
-
-Name: Nix
-Description: Nix Package Manager
-Version: @PACKAGE_VERSION@
-Libs: -L${libdir} -lnixcmd
-Cflags: -I${includedir}/nix -std=c++2a
diff --git a/src/libexpr/flake/meson.build b/src/libexpr/flake/meson.build
index 3ecc30f4e..cce1b0c75 100644
--- a/src/libexpr/flake/meson.build
+++ b/src/libexpr/flake/meson.build
@@ -4,5 +4,5 @@ libexpr_generated_headers += custom_target(
   output : '@PLAINNAME@.gen.hh',
   capture : true,
   install : true,
-  install_dir : includedir / 'nix/flake',
+  install_dir : includedir / 'lix/libexpr/flake',
 )
diff --git a/src/libexpr/lix-expr.pc.in b/src/libexpr/lix-expr.pc.in
new file mode 100644
index 000000000..5e850976d
--- /dev/null
+++ b/src/libexpr/lix-expr.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: Lix libexpr
+Description: Lix Package Manager (libexpr)
+Version: @PACKAGE_VERSION@
+Requires: lix-base lix-util lix-fetchers lix-store bdw-gc
+Libs: -L${libdir} -llixexpr
+Cflags: -I${includedir}/lix/libexpr
diff --git a/src/libexpr/meson.build b/src/libexpr/meson.build
index 099279d56..fda6fde2c 100644
--- a/src/libexpr/meson.build
+++ b/src/libexpr/meson.build
@@ -15,7 +15,7 @@ parser_tab = custom_target(
   # NOTE(Qyriad): Meson doesn't support installing only part of a custom target, so we add
   # an install script below which removes parser-tab.cc.
   install : true,
-  install_dir : includedir / 'nix',
+  install_dir : includedir / 'lix/libexpr',
 )
 
 lexer_tab = custom_target(
@@ -37,7 +37,7 @@ lexer_tab = custom_target(
   # NOTE(Qyriad): Meson doesn't support installing only part of a custom target, so we add
   # an install script below which removes lexer-tab.cc.
   install : true,
-  install_dir : includedir / 'nix',
+  install_dir : includedir / 'lix/libexpr',
 )
 
 # TODO(Qyriad): When the parser and lexer are rewritten this should be removed.
@@ -59,7 +59,7 @@ foreach header : [ 'imported-drv-to-derivation.nix', 'fetchurl.nix' ]
     output : '@PLAINNAME@.gen.hh',
     capture : true,
     install : true,
-    install_dir : includedir / 'nix',
+    install_dir : includedir / 'lix/libexpr',
   )
 endforeach
 subdir('flake')
@@ -127,7 +127,7 @@ libexpr_headers = files(
 )
 
 libexpr = library(
-  'nixexpr',
+  'lixexpr',
   libexpr_sources,
   parser_tab,
   lexer_tab,
@@ -152,7 +152,7 @@ libexpr = library(
 
 install_headers(
   libexpr_headers,
-  subdir : 'nix',
+  subdir : 'lix/libexpr',
   preserve_path : true,
 )
 
@@ -164,8 +164,8 @@ liblixexpr = declare_dependency(
 # FIXME: not using the pkg-config module because it creates way too many deps
 # while meson migration is in progress, and we want to not include boost here
 configure_file(
-  input : 'nix-expr.pc.in',
-  output : 'nix-expr.pc',
+  input : 'lix-expr.pc.in',
+  output : 'lix-expr.pc',
   install_dir : libdir / 'pkgconfig',
   configuration : {
     'prefix' : prefix,
diff --git a/src/libexpr/nix-expr.pc.in b/src/libexpr/nix-expr.pc.in
deleted file mode 100644
index 60ffb5dba..000000000
--- a/src/libexpr/nix-expr.pc.in
+++ /dev/null
@@ -1,10 +0,0 @@
-prefix=@prefix@
-libdir=@libdir@
-includedir=@includedir@
-
-Name: Nix
-Description: Nix Package Manager
-Version: @PACKAGE_VERSION@
-Requires: nix-store bdw-gc
-Libs: -L${libdir} -lnixexpr
-Cflags: -I${includedir}/nix -std=c++2a
diff --git a/src/libfetchers/lix-fetchers.pc.in b/src/libfetchers/lix-fetchers.pc.in
new file mode 100644
index 000000000..fa213b769
--- /dev/null
+++ b/src/libfetchers/lix-fetchers.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: Lix libfetchers
+Description: Lix Package Manager (libfetchers)
+Version: @PACKAGE_VERSION@
+Requires: lix-base lix-util
+Libs: -L${libdir} -llixfetchers
+Cflags: -I${includedir}/lix/libfetchers
diff --git a/src/libfetchers/meson.build b/src/libfetchers/meson.build
index 3809701b7..dbb85b84c 100644
--- a/src/libfetchers/meson.build
+++ b/src/libfetchers/meson.build
@@ -23,7 +23,7 @@ libfetchers_headers = files(
 )
 
 libfetchers = library(
-  'nixfetchers',
+  'lixfetchers',
   libfetchers_sources,
   dependencies : [
     liblixstore,
@@ -35,7 +35,21 @@ libfetchers = library(
   install_rpath : libdir,
 )
 
-install_headers(libfetchers_headers, subdir : 'nix', preserve_path : true)
+install_headers(libfetchers_headers, subdir : 'lix/libfetchers', preserve_path : true)
+
+# FIXME: not using the pkg-config module because it creates way too many deps
+# while meson migration is in progress, and we want to not include boost here
+configure_file(
+  input : 'lix-fetchers.pc.in',
+  output : 'lix-fetchers.pc',
+  install_dir : libdir / 'pkgconfig',
+  configuration : {
+    'prefix' : prefix,
+    'libdir' : libdir,
+    'includedir' : includedir,
+    'PACKAGE_VERSION' : meson.project_version(),
+  },
+)
 
 liblixfetchers = declare_dependency(
   include_directories : include_directories('.'),
diff --git a/src/libmain/lix-main.pc.in b/src/libmain/lix-main.pc.in
new file mode 100644
index 000000000..0ceaec393
--- /dev/null
+++ b/src/libmain/lix-main.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: Lix libmain
+Description: Lix Package Manager (libmain)
+Version: @PACKAGE_VERSION@
+Requires: lix-base lix-util
+Libs: -L${libdir} -llixmain
+Cflags: -I${includedir}/lix/libmain
diff --git a/src/libmain/meson.build b/src/libmain/meson.build
index 3f50b158d..b17247a9d 100644
--- a/src/libmain/meson.build
+++ b/src/libmain/meson.build
@@ -14,7 +14,7 @@ libmain_headers = files(
 )
 
 libmain = library(
-  'nixmain',
+  'lixmain',
   libmain_sources,
   dependencies : [
     liblixutil,
@@ -25,7 +25,7 @@ libmain = library(
   install_rpath : libdir,
 )
 
-install_headers(libmain_headers, subdir : 'nix', preserve_path : true)
+install_headers(libmain_headers, subdir : 'lix/libmain', preserve_path : true)
 
 liblixmain = declare_dependency(
   include_directories : include_directories('.'),
@@ -35,8 +35,8 @@ liblixmain = declare_dependency(
 # FIXME: not using the pkg-config module because it creates way too many deps
 # while meson migration is in progress, and we want to not include boost here
 configure_file(
-  input : 'nix-main.pc.in',
-  output : 'nix-main.pc',
+  input : 'lix-main.pc.in',
+  output : 'lix-main.pc',
   install_dir : libdir / 'pkgconfig',
   configuration : {
     'prefix' : prefix,
diff --git a/src/libmain/nix-main.pc.in b/src/libmain/nix-main.pc.in
deleted file mode 100644
index fb3ead6fa..000000000
--- a/src/libmain/nix-main.pc.in
+++ /dev/null
@@ -1,9 +0,0 @@
-prefix=@prefix@
-libdir=@libdir@
-includedir=@includedir@
-
-Name: Nix
-Description: Nix Package Manager
-Version: @PACKAGE_VERSION@
-Libs: -L${libdir} -lnixmain
-Cflags: -I${includedir}/nix -std=c++2a
diff --git a/src/libstore/lix-store.pc.in b/src/libstore/lix-store.pc.in
new file mode 100644
index 000000000..69c323a28
--- /dev/null
+++ b/src/libstore/lix-store.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: Lix libstore
+Description: Lix Package Manager (libstore)
+Version: @PACKAGE_VERSION@
+Requires: lix-base lix-util
+Libs: -L${libdir} -llixstore -llixutil
+Cflags: -I${includedir}/lix/libstore
diff --git a/src/libstore/meson.build b/src/libstore/meson.build
index 5fde92dd0..4ccb03df7 100644
--- a/src/libstore/meson.build
+++ b/src/libstore/meson.build
@@ -6,7 +6,7 @@ foreach header : [ 'schema.sql', 'ca-specific-schema.sql' ]
     output : '@PLAINNAME@.gen.hh',
     capture : true,
     install : true,
-    install_dir : includedir / 'nix',
+    install_dir : includedir / 'lix/libstore',
   )
 endforeach
 
@@ -201,7 +201,7 @@ foreach name, value : cpp_str_defines
 endforeach
 
 libstore = library(
-  'nixstore',
+  'lixstore',
   libstore_generated_headers,
   libstore_sources,
   dependencies : [
@@ -224,7 +224,7 @@ libstore = library(
   install_rpath : libdir,
 )
 
-install_headers(libstore_headers, subdir : 'nix', preserve_path : true)
+install_headers(libstore_headers, subdir : 'lix/libstore', preserve_path : true)
 
 # Used by libfetchers.
 liblixstore = declare_dependency(
@@ -235,8 +235,8 @@ liblixstore = declare_dependency(
 # FIXME: not using the pkg-config module because it creates way too many deps
 # while meson migration is in progress, and we want to not include boost here
 configure_file(
-  input : 'nix-store.pc.in',
-  output : 'nix-store.pc',
+  input : 'lix-store.pc.in',
+  output : 'lix-store.pc',
   install_dir : libdir / 'pkgconfig',
   configuration : {
     'prefix' : prefix,
diff --git a/src/libstore/nix-store.pc.in b/src/libstore/nix-store.pc.in
deleted file mode 100644
index dc42d0bca..000000000
--- a/src/libstore/nix-store.pc.in
+++ /dev/null
@@ -1,9 +0,0 @@
-prefix=@prefix@
-libdir=@libdir@
-includedir=@includedir@
-
-Name: Nix
-Description: Nix Package Manager
-Version: @PACKAGE_VERSION@
-Libs: -L${libdir} -lnixstore -lnixutil
-Cflags: -I${includedir}/nix -std=c++2a
diff --git a/src/libutil/lix-util.pc.in b/src/libutil/lix-util.pc.in
new file mode 100644
index 000000000..cd749aabb
--- /dev/null
+++ b/src/libutil/lix-util.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: Lix libutil
+Description: Lix Package Manager (libutil)
+Version: @PACKAGE_VERSION@
+Requires: lix-base lix-util
+Libs: -L${libdir} -llixutil
+Cflags: -I${includedir}/lix/libutil
diff --git a/src/libutil/meson.build b/src/libutil/meson.build
index 13266f6bd..58e0bd062 100644
--- a/src/libutil/meson.build
+++ b/src/libutil/meson.build
@@ -100,7 +100,7 @@ libutil_headers = files(
 )
 
 libutil = library(
-  'nixutil',
+  'lixutil',
   libutil_sources,
   dependencies : [
     aws_sdk,
@@ -118,7 +118,21 @@ libutil = library(
   install : true,
 )
 
-install_headers(libutil_headers, subdir : 'nix', preserve_path : true)
+install_headers(libutil_headers, subdir : 'lix/libutil', preserve_path : true)
+
+# FIXME: not using the pkg-config module because it creates way too many deps
+# while meson migration is in progress, and we want to not include boost here
+configure_file(
+  input : 'lix-util.pc.in',
+  output : 'lix-util.pc',
+  install_dir : libdir / 'pkgconfig',
+  configuration : {
+    'prefix' : prefix,
+    'libdir' : libdir,
+    'includedir' : includedir,
+    'PACKAGE_VERSION' : meson.project_version(),
+  },
+)
 
 # Used by libstore and libfetchers.
 liblixutil = declare_dependency(
diff --git a/src/lix-base.pc.in b/src/lix-base.pc.in
new file mode 100644
index 000000000..925a7753a
--- /dev/null
+++ b/src/lix-base.pc.in
@@ -0,0 +1,8 @@
+prefix=@prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: Lix base
+Description: Lix Package Manager (config.hh fixup)
+Version: @PACKAGE_VERSION@
+Cflags: -I${includedir}/lix
diff --git a/tests/unit/meson.build b/tests/unit/meson.build
index f5355cce8..a997a0d56 100644
--- a/tests/unit/meson.build
+++ b/tests/unit/meson.build
@@ -17,7 +17,7 @@ libutil_test_support_sources = files(
   'libutil-support/tests/terminal-code-eater.cc',
 )
 libutil_test_support = library(
-  'nixutil-test-support',
+  'lixutil-test-support',
   libutil_test_support_sources,
   dependencies : [
     liblixutil,
@@ -57,7 +57,7 @@ libutil_tests_sources = files(
 )
 
 libutil_tester = executable(
-  'libnixutil-tests',
+  'liblixutil-tests',
   libutil_tests_sources,
   dependencies : [
     rapidcheck,
@@ -90,7 +90,7 @@ libstore_test_support_sources = files(
 )
 
 libstore_test_support = library(
-  'nixstore-test-support',
+  'lixstore-test-support',
   libstore_test_support_sources,
   dependencies : [
     liblixutil_test_support,
@@ -124,7 +124,7 @@ libstore_tests_sources = files(
 )
 
 libstore_tester = executable(
-  'libnixstore-tests',
+  'liblixstore-tests',
   libstore_tests_sources,
   dependencies : [
     liblixstore_test_support,
@@ -154,7 +154,7 @@ libexpr_test_support_sources = files(
 )
 
 libexpr_test_support = library(
-  'nixexpr-test-support',
+  'lixexpr-test-support',
   libexpr_test_support_sources,
   dependencies : [
     liblixstore_test_support,
@@ -185,7 +185,7 @@ libexpr_tests_sources = files(
 )
 
 libexpr_tester = executable(
-  'libnixexpr-tests',
+  'liblixexpr-tests',
   libexpr_tests_sources,
   dependencies : [
     liblixexpr_test_support,