Merge pull request #245388 from oxij/source-root-src

    hash = "sha256-miW//pnOmww2i6SOGbkrAIdc/JMDT4FJLqdMFojZeoY=";

  };

  sourceRoot = "source/bindings/python";

  sourceRoot = "${src.name}/bindings/python";

  nativeBuildInputs = [

    cargo

##### `sourceRoot` {#var-stdenv-sourceRoot}

After running `unpackPhase`, the generic builder changes the current directory to the directory created by unpacking the sources. If there are multiple source directories, you should set `sourceRoot` to the name of the intended directory. Set `sourceRoot = ".";` if you use `srcs` and control the unpack phase yourself.

After unpacking all of `src` and `srcs`, if neither of `sourceRoot` and `setSourceRoot` are set, `unpackPhase` of the generic builder checks that the unpacking produced a single directory and moves the current working directory into it.

By default the `sourceRoot` is set to `"source"`. If you want to point to a sub-directory inside your project, you therefore need to set `sourceRoot = "source/my-sub-directory"`.

If `unpackPhase` produces multiple source directories, you should set `sourceRoot` to the name of the intended directory.

You can also set `sourceRoot = ".";` if you want to control it yourself in a later phase.

For example, if your want your build to start in a sub-directory inside your sources, and you are using `fetchzip`-derived `src` (like `fetchFromGitHub` or similar), you need to set `sourceRoot = "${src.name}/my-sub-directory"`.

##### `setSourceRoot` {#var-stdenv-setSourceRoot}

Alternatively to setting `sourceRoot`, you can set `setSourceRoot` to a shell command to be evaluated by the unpack phase after the sources have been unpacked. This command must set `sourceRoot`.

For example, if you are using `fetchurl` on an archive file that gets unpacked into a single directory the name of which changes between package versions, and you want your build to start in its sub-directory, you need to set `setSourceRoot = "sourceRoot=$(echo */my-sub-directory)";`, or in the case of multiple sources, you could use something more specific, like `setSourceRoot = "sourceRoot=$(echo ${pname}-*/my-sub-directory)";`.

##### `preUnpack` {#var-stdenv-preUnpack}

Hook executed at the start of the unpack phase.

## Nixpkgs internals {#sec-release-23.11-nixpkgs-internals}

- The use of `sourceRoot = "source";`, `sourceRoot = "source/subdir";`, and similar lines in package derivations using the default `unpackPhase` is deprecated as it requires `unpackPhase` to always produce a directory named "source". Use `sourceRoot = src.name`, `sourceRoot = "${src.name}/subdir";`, or `setSourceRoot = "sourceRoot=$(echo */subdir)";` or similar instead.

- The `qemu-vm.nix` module by default now identifies block devices via

  persistent names available in `/dev/disk/by-*`. Because the rootDevice is

  identfied by its filesystem label, it needs to be formatted before the VM is

  NIX_CFLAGS_COMPILE = [ "-Wno-error=deprecated-declarations" ];

  makeFlags = [ "DESTDIR=\${out}" "PREFIX=''" ];

  sourceRoot = "source/src";

  sourceRoot = "${src.name}/src";

  nativeBuildInputs = [ pkg-config wrapGAppsHook4 ];

  buildInputs = [ gtk4 alsa-lib ];

  postInstall = ''

    fetchSubmodules = true;

  };

  sourceRoot = "source/src";

  sourceRoot = "${finalAttrs.src.name}/src";

  postPatch = ''

    echo '#define GIT_REVISION "${finalAttrs.version}-NixOS"' > git-rev.h