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author | Nicolas B. Pierron <nicolas.b.pierron@nbp.name> | 2016-12-17 18:05:21 +0000 |
---|---|---|
committer | Nicolas B. Pierron <nicolas.b.pierron@gmail.com> | 2017-01-16 01:17:33 +0100 |
commit | f5dfe78a1eb5ff8dfcc7ab37cfc132c5f31d3cef (patch) | |
tree | d7422aa64c2735316fb2bdd2022f90d7a15a453c /pkgs/stdenv/darwin | |
parent | 7c8d3aa21d420f5e1546d0021c2e950ac1ebf4c6 (diff) |
Add overlays mechanism to Nixpkgs.
This patch add a new argument to Nixpkgs default expression named "overlays".
By default, the value of the argument is either taken from the environment variable `NIXPKGS_OVERLAYS`,
or from the directory `~/.nixpkgs/overlays/`. If the environment variable does not name a valid directory
then this mechanism would fallback on the home directory. If the home directory does not exists it will
fallback on an empty list of overlays.
The overlays directory should contain the list of extra Nixpkgs stages which would be used to extend the
content of Nixpkgs, with additional set of packages. The overlays, i-e directory, files, symbolic links
are used in alphabetical order.
The simplest overlay which extends Nixpkgs with nothing looks like:
```nix
self: super: {
}
```
More refined overlays can use `super` as the basis for building new packages, and `self` as a way to query
the final result of the fix-point.
An example of overlay which extends Nixpkgs with a small set of packages can be found at:
https://github.com/nbp/nixpkgs-mozilla/blob/nixpkgs-overlay/moz-overlay.nix
To use this file, checkout the repository and add a symbolic link to
the `moz-overlay.nix` file in `~/.nixpkgs/overlays` directory.
Diffstat (limited to 'pkgs/stdenv/darwin')
-rw-r--r-- | pkgs/stdenv/darwin/default.nix | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/pkgs/stdenv/darwin/default.nix b/pkgs/stdenv/darwin/default.nix index 9c860bfb0f92..e3a87ea078fc 100644 --- a/pkgs/stdenv/darwin/default.nix +++ b/pkgs/stdenv/darwin/default.nix @@ -1,5 +1,5 @@ { lib -, system, platform, crossSystem, config +, system, platform, crossSystem, config, overlays # Allow passing in bootstrap files directly so we can test the stdenv bootstrap process when changing the bootstrap tools , bootstrapFiles ? let @@ -98,7 +98,7 @@ in rec { }; in { - inherit system platform crossSystem config; + inherit system platform crossSystem config overlays; stdenv = thisStdenv; }; @@ -316,7 +316,7 @@ in rec { stage3 stage4 (prevStage: { - inherit system crossSystem platform config; + inherit system crossSystem platform config overlays; stdenv = stdenvDarwin prevStage; }) ]; |