nixForLinking: init (#384099)

pkgs/build-support/node/fetch-yarn-deps/default.nix

@@ -18,7 +18,7 @@
   makeSetupHook,
   cacert,
   callPackage,
-  nix,
+  nixForLinking,
 }:
 
 let
@@ -55,7 +55,7 @@ in
           lib.makeBinPath [
             coreutils
             nix-prefetch-git
-            nix
+            nixForLinking
           ]
         }
 

pkgs/by-name/at/attic-client/package.nix

@@ -2,7 +2,7 @@
   lib,
   rustPlatform,
   fetchFromGitHub,
-  nix,
+  nixForLinking,
   nixosTests,
   boost,
   pkg-config,
@@ -29,7 +29,7 @@ rustPlatform.buildRustPackage {
 
   buildInputs =
     [
-      nix
+      nixForLinking
       boost
     ]
     ++ lib.optionals stdenv.hostPlatform.isDarwin (
@@ -44,7 +44,7 @@ rustPlatform.buildRustPackage {
   useFetchCargoVendor = true;
 
   ATTIC_DISTRIBUTOR = "nixpkgs";
-  NIX_INCLUDE_PATH = "${lib.getDev nix}/include";
+  NIX_INCLUDE_PATH = "${lib.getDev nixForLinking}/include";
 
   # Attic interacts with Nix directly and its tests require trusted-user access
   # to nix-daemon to import NARs, which is not possible in the build sandbox.

pkgs/by-name/nu/nurl/package.nix

@@ -8,7 +8,7 @@
   darwin,
   gitMinimal,
   mercurial,
-  nix,
+  nixForLinking,
 }:
 
 rustPlatform.buildRustPackage rec {
@@ -43,7 +43,7 @@ rustPlatform.buildRustPackage rec {
         lib.makeBinPath [
           gitMinimal
           mercurial
-          nix
+          nixForLinking
         ]
       }
     installManPage artifacts/nurl.1

pkgs/development/tools/language-servers/nixd/default.nix

@@ -8,7 +8,7 @@
   llvmPackages,
   meson,
   ninja,
-  nix,
+  nixForLinking,
   nix-update-script,
   nixd,
   nixf,
@@ -101,12 +101,12 @@ in
       ];
 
       buildInputs = [
-        nix
+        nixForLinking
         gtest
         boost
       ];
 
-      env.CXXFLAGS = "-include ${nix.dev}/include/nix/config.h";
+      env.CXXFLAGS = "-include ${nixForLinking.dev}/include/nix/config.h";
 
       passthru.tests.pkg-config = testers.hasPkgConfigModules {
         package = nixt;
@@ -127,7 +127,7 @@ in
       sourceRoot = "${common.src.name}/nixd";
 
       buildInputs = [
-        nix
+        nixForLinking
         nixf
         nixt
         llvmPackages.llvm
@@ -137,7 +137,7 @@ in
 
       nativeBuildInputs = common.nativeBuildInputs ++ [ cmake ];
 
-      env.CXXFLAGS = "-include ${nix.dev}/include/nix/config.h";
+      env.CXXFLAGS = "-include ${nixForLinking.dev}/include/nix/config.h";
 
       # See https://github.com/nix-community/nixd/issues/519
       doCheck = false;

pkgs/tools/package-management/nix-du/default.nix

@@ -3,7 +3,7 @@
   stdenv,
   fetchFromGitHub,
   rustPlatform,
-  nix,
+  nixForLinking,
   nlohmann_json,
   boost,
   graphviz,
@@ -27,13 +27,13 @@ rustPlatform.buildRustPackage rec {
 
   doCheck = true;
   nativeCheckInputs = [
-    nix
+    nixForLinking
     graphviz
   ];
 
   buildInputs = [
     boost
-    nix
+    nixForLinking
     nlohmann_json
   ] ++ lib.optionals stdenv.hostPlatform.isDarwin [ Security ];
 

pkgs/tools/package-management/nix-prefetch-scripts/default.nix

@@ -1,5 +1,18 @@
 { lib, stdenv, makeWrapper, buildEnv
-, bash, breezy, coreutils, cvs, findutils, gawk, git, git-lfs, gnused, mercurial, nix, subversion
+, bash, breezy, coreutils, cvs, findutils, gawk, git, git-lfs, gnused, mercurial
+, # FIXME: These scripts should not depend on Nix, they should depend on a
+  # `.nar` hasher compatible with Nix.
+  #
+  # The fact that these scripts depend on Nix means that e.g. Chromium depends
+  # on Nix.
+  #
+  # Also should be fixed:
+  # - prefetch-yarn-deps
+  # - nurl, nix-init
+  #
+  # Gridlock is one such candidate: https://github.com/lf-/gridlock
+  nixForLinking
+, subversion
 }:
 
 let mkPrefetchScript = tool: src: deps:
@@ -15,7 +28,7 @@ let mkPrefetchScript = tool: src: deps:
     installPhase = ''
       install -vD ${src} $out/bin/$name;
       wrapProgram $out/bin/$name \
-        --prefix PATH : ${lib.makeBinPath (deps ++ [ coreutils gnused nix ])} \
+        --prefix PATH : ${lib.makeBinPath (deps ++ [ coreutils gnused nixForLinking ])} \
         --set HOME /homeless-shelter
     '';
 

pkgs/top-level/all-packages.nix

@@ -17518,6 +17518,16 @@ with pkgs;
 
   nix = nixVersions.stable;
 
+  # Overlays for CppNix nightly, Lix, or Tvix want to change the default Nix
+  # implementation in Nixpkgs by overriding `pkgs.nix`. However, some packages
+  # link against the internal/unstable CppNix APIs directly, and these packages
+  # will break if built with different versions or implementations of Nix.
+  #
+  # If you want to swap out the Nix implementation in your package set, you
+  # don't want these packages to break. Therefore, some packages will refer to
+  # `nixForLinking` explicitly, at least until these dependencies can be sorted out.
+  nixForLinking = nixVersions.stable;
+
   nixStatic = pkgsStatic.nix;
 
   lixVersions = recurseIntoAttrs (callPackage ../tools/package-management/lix {