3 files changed, 23 insertions, 8 deletions
diff --git a/src/nix/add-to-store.cc b/src/nix/add-to-store.cc
index ad1f9e91f..e183cb8b5 100644
--- a/src/nix/add-to-store.cc
+++ b/src/nix/add-to-store.cc
@@ -9,6 +9,7 @@ struct CmdAddToStore : MixDryRun, StoreCommand
 {
     Path path;
     std::optional<std::string> namePart;
+    FileIngestionMethod ingestionMethod = FileIngestionMethod::Recursive;
 
     CmdAddToStore()
     {
@@ -21,6 +22,13 @@ struct CmdAddToStore : MixDryRun, StoreCommand
             .labels = {"name"},
             .handler = {&namePart},
         });
+
+        addFlag({
+            .longName = "flat",
+            .shortName = 0,
+            .description = "add flat file to the Nix store",
+            .handler = {&ingestionMethod, FileIngestionMethod::Flat},
+        });
     }
 
     std::string description() override
@@ -45,12 +53,19 @@ struct CmdAddToStore : MixDryRun, StoreCommand
 
         auto narHash = hashString(htSHA256, *sink.s);
 
-        ValidPathInfo info(store->makeFixedOutputPath(FileIngestionMethod::Recursive, narHash, *namePart));
+        Hash hash = narHash;
+        if (ingestionMethod == FileIngestionMethod::Flat) {
+            HashSink hsink(htSHA256);
+            readFile(path, hsink);
+            hash = hsink.finish().first;
+        }
+
+        ValidPathInfo info(store->makeFixedOutputPath(ingestionMethod, hash, *namePart));
         info.narHash = narHash;
         info.narSize = sink.s->size();
         info.ca = std::optional { FixedOutputHash {
-            .method = FileIngestionMethod::Recursive,
-            .hash = *info.narHash,
+            .method = ingestionMethod,
+            .hash = hash,
         } };
 
         if (!dryRun) {
diff --git a/src/nix/develop.cc b/src/nix/develop.cc
index 2f590f53f..a0c119e43 100644
--- a/src/nix/develop.cc
+++ b/src/nix/develop.cc
@@ -68,22 +68,22 @@ BuildEnvironment readEnvironment(const Path & path)
 
         std::smatch match;
 
-        if (std::regex_search(pos, file.cend(), match, declareRegex)) {
+        if (std::regex_search(pos, file.cend(), match, declareRegex, std::regex_constants::match_continuous)) {
             pos = match[0].second;
             exported.insert(match[1]);
         }
 
-        else if (std::regex_search(pos, file.cend(), match, varRegex)) {
+        else if (std::regex_search(pos, file.cend(), match, varRegex, std::regex_constants::match_continuous)) {
             pos = match[0].second;
             res.env.insert({match[1], Var { .exported = exported.count(match[1]) > 0, .value = match[2] }});
         }
 
-        else if (std::regex_search(pos, file.cend(), match, assocArrayRegex)) {
+        else if (std::regex_search(pos, file.cend(), match, assocArrayRegex, std::regex_constants::match_continuous)) {
             pos = match[0].second;
             res.env.insert({match[1], Var { .associative = true, .value = match[2] }});
         }
 
-        else if (std::regex_search(pos, file.cend(), match, functionRegex)) {
+        else if (std::regex_search(pos, file.cend(), match, functionRegex, std::regex_constants::match_continuous)) {
             res.bashFunctions = std::string(pos, file.cend());
             break;
         }
diff --git a/src/nix/path-info.cc b/src/nix/path-info.cc
index 65f73cd94..0c12efaf0 100644
--- a/src/nix/path-info.cc
+++ b/src/nix/path-info.cc
@@ -61,7 +61,7 @@ struct CmdPathInfo : StorePathsCommand, MixJSON
         };
     }
 
-    void printSize(unsigned long long value)
+    void printSize(uint64_t value)
     {
         if (!humanReadable) {
             std::cout << fmt("\t%11d", value);