Skip darwin when testing hydra eval in github action

Author: hamishmack

.github/workflows/pipeline.yml

@@ -145,9 +145,10 @@ jobs:
       - name: "Check that jobset will evaluate in Hydra at ifdLevel 0 and 1"
         run: |
           nix-build build.nix -A maintainer-scripts.check-hydra -o check-hydra.sh
-          sed -i 's/ifdLevel = 3/ifdLevel = 0/' flake.nix
+          sed -i 's/runningHydraEvalTest = false;/runningHydraEvalTest = true;/' flake.nix
+          sed -i 's/ifdLevel = 3;/ifdLevel = 0;/' flake.nix
           ./check-hydra.sh
-          sed -i 's/ifdLevel = 0/ifdLevel = 1/' flake.nix
+          sed -i 's/ifdLevel = 0;/ifdLevel = 1;/' flake.nix
           ./check-hydra.sh
 
   hydra-ifdLevel-2:
@@ -158,7 +159,8 @@ jobs:
       - name: "Check that jobset will evaluate in Hydra at ifdLevel 2"
         run: |
           nix-build build.nix -A maintainer-scripts.check-hydra -o check-hydra.sh
-          sed -i 's/ifdLevel = 3/ifdLevel = 2/' flake.nix
+          sed -i 's/runningHydraEvalTest = false;/runningHydraEvalTest = true;/' flake.nix
+          sed -i 's/ifdLevel = 3;/ifdLevel = 2;/' flake.nix
           ./check-hydra.sh
 
   hydra-ifdLevel-3-and-ghc-8-10:
@@ -169,26 +171,9 @@ jobs:
       - name: "Check that jobset will evaluate in Hydra at ifdLevel 3"
         run: |
           nix-build build.nix -A maintainer-scripts.check-hydra -o check-hydra.sh
+          sed -i 's/runningHydraEvalTest = false;/runningHydraEvalTest = true;/' flake.nix
           ./check-hydra.sh
 
-  hydra-ifdLevel-3-and-ghc-9-2:
-    runs-on: [self-hosted, linux]
-    steps:
-      - uses: actions/checkout@v4
-      - name: "Check that jobset will evaluate in Hydra at ifdLevel 3 and ghc 9.2"
-        run: |
-          nix-build build.nix -A maintainer-scripts.check-hydra -o check-hydra.sh
-          ./check-hydra.sh --arg ifdLevel 3 --arg include 'x: __substring 0 5 x == "ghc92"'
-
-  hydra-ifdLevel-3-and-not-ghc-8-10-or-9-2:
-    runs-on: [self-hosted, linux]
-    steps:
-      - uses: actions/checkout@v4
-      - name: "Check that jobset will evaluate in Hydra at ifdLevel 3 and not (ghc 8.10 or ghc 9.2)"
-        run: |
-          nix-build build.nix -A maintainer-scripts.check-hydra -o check-hydra.sh
-          ./check-hydra.sh --arg ifdLevel 3 --arg include 'x: !(__substring 0 6 x == "ghc810" || __substring 0 5 x == "ghc92")'
-
   closure-size:
     runs-on: [self-hosted, linux]
     steps:

flake.nix

@@ -91,6 +91,7 @@
       callFlake = import flake-compat;
 
       ifdLevel = 3;
+      runningHydraEvalTest = false;
       compiler = "ghc928";
       config = import ./config.nix;
 
@@ -108,9 +109,10 @@
       # systems supported by haskell.nix
       systems = [
         "x86_64-linux"
+      ] ++ (if runningHydraEvalTest then [] else [
         "x86_64-darwin"
         "aarch64-darwin"
-      ];
+      ]);
 
       nixpkgsArgs = {
         inherit config;