nixos,nixpkgs: only build essentials on i686

nixos/release-combined.nix

@@ -4,7 +4,8 @@
 
 { nixpkgs ? { outPath = ./..; revCount = 56789; shortRev = "gfedcba"; }
 , stableBranch ? false
-, supportedSystems ? [ "x86_64-linux" "i686-linux" ]
+, supportedSystems ? [ "x86_64-linux" ]
+, limitedSupportedSystems ? [ "i686-linux" ]
 }:
 
 let
@@ -19,10 +20,16 @@ let
       else pkgs.lib.mapAttrs (n: v: removeMaintainers v) set
     else set;
 
+  allSupportedNixpkgs = builtins.removeAttrs (removeMaintainers (import ../pkgs/top-level/release.nix {
+    supportedSystems = supportedSystems ++ limitedSupportedSystems;
+    nixpkgs = nixpkgsSrc;
+  })) [ "unstable" ];
+
 in rec {
 
   nixos = removeMaintainers (import ./release.nix {
-    inherit stableBranch supportedSystems;
+    inherit stableBranch;
+    supportedSystems = supportedSystems ++ limitedSupportedSystems;
     nixpkgs = nixpkgsSrc;
   });
 
@@ -38,8 +45,11 @@ in rec {
       maintainers = [ pkgs.lib.maintainers.eelco ];
     };
     constituents =
-      let all = x: map (system: x.${system}) supportedSystems; in
-      [ nixos.channel
+      let
+        all = x: map (system: x.${system})
+          (supportedSystems ++ limitedSupportedSystems);
+      in [
+        nixos.channel
         (all nixos.dummy)
         (all nixos.manual)
 
@@ -106,8 +116,8 @@ in rec {
         (all nixos.tests.xfce)
 
         nixpkgs.tarball
-        (all nixpkgs.emacs)
-        (all nixpkgs.jdk)
+        (all allSupportedNixpkgs.emacs)
+        (all allSupportedNixpkgs.jdk)
       ];
   });
 

nixos/release.nix

@@ -1,6 +1,6 @@
 { nixpkgs ? { outPath = ./..; revCount = 56789; shortRev = "gfedcba"; }
 , stableBranch ? false
-, supportedSystems ? [ "x86_64-linux" "i686-linux" ]
+, supportedSystems ? [ "x86_64-linux" ]
 }:
 
 with import ../lib;

pkgs/top-level/release-small.nix

@@ -2,7 +2,7 @@
    the load on Hydra when testing the `stdenv-updates' branch. */
 
 { nixpkgs ? { outPath = (import ../../lib).cleanSource ../..; revCount = 1234; shortRev = "abcdef"; }
-, supportedSystems ? [ "x86_64-linux" "i686-linux" "x86_64-darwin" ]
+, supportedSystems ? [ "x86_64-linux" "x86_64-darwin" ]
 }:
 
 with import ./release-lib.nix { inherit supportedSystems; };

pkgs/top-level/release.nix

@@ -8,20 +8,23 @@
 
    $ nix-build pkgs/top-level/release.nix -A coreutils.x86_64-linux
 */
-
 { nixpkgs ? { outPath = (import ../../lib).cleanSource ../..; revCount = 1234; shortRev = "abcdef"; }
 , officialRelease ? false
-, # The platforms for which we build Nixpkgs.
-  supportedSystems ? [ "x86_64-linux" "i686-linux" "x86_64-darwin" "aarch64-linux" ]
-, # Strip most of attributes when evaluating to spare memory usage
-  scrubJobs ? true
-, # Attributes passed to nixpkgs. Don't build packages marked as unfree.
-  nixpkgsArgs ? { config = { allowUnfree = false; inHydra = true; }; }
+  # The platforms for which we build Nixpkgs.
+, supportedSystems ? [ "x86_64-linux" "x86_64-darwin" "aarchh64-linux" ]
+, limitedSupportedSystems ? [ "i686-linux" ]
+  # Strip most of attributes when evaluating to spare memory usage
+,  scrubJobs ? true
+  # Attributes passed to nixpkgs. Don't build packages marked as unfree.
+,  nixpkgsArgs ? { config = { allowUnfree = false; inHydra = true; }; }
 }:
 
 with import ./release-lib.nix { inherit supportedSystems scrubJobs nixpkgsArgs; };
 
 let
+
+  systemsWithAnySupport = supportedSystems ++ limitedSupportedSystems;
+
   jobs =
     { tarball = import ./make-tarball.nix { inherit pkgs nixpkgs officialRelease; };
 
@@ -55,43 +58,36 @@ let
               jobs.manual
               jobs.lib-tests
               jobs.stdenv.x86_64-linux
-              jobs.stdenv.i686-linux
               jobs.stdenv.x86_64-darwin
               jobs.linux.x86_64-linux
-              jobs.linux.i686-linux
               jobs.python.x86_64-linux
-              jobs.python.i686-linux
               jobs.python.x86_64-darwin
               jobs.python3.x86_64-linux
-              jobs.python3.i686-linux
               jobs.python3.x86_64-darwin
               # Many developers use nix-repl
               jobs.nix-repl.x86_64-linux
-              jobs.nix-repl.i686-linux
               jobs.nix-repl.x86_64-darwin
               # Needed by travis-ci to test PRs
-              jobs.nox.i686-linux
               jobs.nox.x86_64-linux
               jobs.nox.x86_64-darwin
               # Ensure that X11/GTK+ are in order.
               jobs.thunderbird.x86_64-linux
-              jobs.thunderbird.i686-linux
               # Ensure that basic stuff works on darwin
               jobs.git.x86_64-darwin
               jobs.mysql.x86_64-darwin
               jobs.vim.x86_64-darwin
             ] ++ lib.collect lib.isDerivation jobs.stdenvBootstrapTools;
         };
-    } // (lib.optionalAttrs (builtins.elem "i686-linux" supportedSystems) {
+    } // (lib.optionalAttrs (builtins.elem "i686-linux" systemsWithAnySupport) {
       stdenvBootstrapTools.i686-linux =
         { inherit (import ../stdenv/linux/make-bootstrap-tools.nix { system = "i686-linux"; }) dist test; };
-    }) // (lib.optionalAttrs (builtins.elem "x86_64-linux" supportedSystems) {
+    }) // (lib.optionalAttrs (builtins.elem "x86_64-linux" systemsWithAnySupport) {
       stdenvBootstrapTools.x86_64-linux =
         { inherit (import ../stdenv/linux/make-bootstrap-tools.nix { system = "x86_64-linux"; }) dist test; };
-    }) // (lib.optionalAttrs (builtins.elem "aarch64-linux" supportedSystems) {
+    }) // (lib.optionalAttrs (builtins.elem "aarch64-linux" systemsWithAnySupport) {
       stdenvBootstrapTools.aarch64-linux =
         { inherit (import ../stdenv/linux/make-bootstrap-tools.nix { system = "aarch64-linux"; }) dist test; };
-    }) // (lib.optionalAttrs (builtins.elem "x86_64-darwin" supportedSystems) {
+    }) // (lib.optionalAttrs (builtins.elem "x86_64-darwin" systemsWithAnySupport) {
       stdenvBootstrapTools.x86_64-darwin =
         let
           bootstrap = import ../stdenv/darwin/make-bootstrap-tools.nix { system = "x86_64-darwin"; };