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1# Experimental flake interface to Nixpkgs. 2# See https://github.com/NixOS/rfcs/pull/49 for details. 3{ 4 description = "A collection of packages for the Nix package manager"; 5 6 outputs = { self }: 7 let 8 jobs = import ./pkgs/top-level/release.nix { 9 nixpkgs = self; 10 }; 11 12 lib = import ./lib; 13 14 forAllSystems = lib.genAttrs lib.systems.flakeExposed; 15 in 16 { 17 lib = lib.extend (final: prev: { 18 19 nixos = import ./nixos/lib { lib = final; }; 20 21 nixosSystem = args: 22 import ./nixos/lib/eval-config.nix ( 23 args // { 24 modules = args.modules ++ [{ 25 system.nixos.versionSuffix = 26 ".${final.substring 0 8 (self.lastModifiedDate or self.lastModified or "19700101")}.${self.shortRev or "dirty"}"; 27 system.nixos.revision = final.mkIf (self ? rev) self.rev; 28 }]; 29 } // lib.optionalAttrs (! args?system) { 30 # Allow system to be set modularly in nixpkgs.system. 31 # We set it to null, to remove the "legacy" entrypoint's 32 # non-hermetic default. 33 system = null; 34 } 35 ); 36 }); 37 38 checks.x86_64-linux.tarball = jobs.tarball; 39 40 htmlDocs = { 41 nixpkgsManual = jobs.manual; 42 nixosManual = (import ./nixos/release-small.nix { 43 nixpkgs = self; 44 }).nixos.manual.x86_64-linux; 45 }; 46 47 # The "legacy" in `legacyPackages` doesn't imply that the packages exposed 48 # through this attribute are "legacy" packages. Instead, `legacyPackages` 49 # is used here as a substitute attribute name for `packages`. The problem 50 # with `packages` is that it makes operations like `nix flake show 51 # nixpkgs` unusably slow due to the sheer number of packages the Nix CLI 52 # needs to evaluate. But when the Nix CLI sees a `legacyPackages` 53 # attribute it displays `omitted` instead of evaluating all packages, 54 # which keeps `nix flake show` on Nixpkgs reasonably fast, though less 55 # information rich. 56 legacyPackages = forAllSystems (system: import ./. { inherit system; }); 57 58 nixosModules = { 59 notDetected = ./nixos/modules/installer/scan/not-detected.nix; 60 61 /* 62 Make the `nixpkgs.*` configuration read-only. Guarantees that `pkgs` 63 is the way you initialize it. 64 65 Example: 66 67 { 68 imports = [ nixpkgs.nixosModules.readOnlyPkgs ]; 69 nixpkgs.pkgs = nixpkgs.legacyPackages.x86_64-linux; 70 } 71 */ 72 readOnlyPkgs = ./nixos/modules/misc/nixpkgs/read-only.nix; 73 }; 74 }; 75}