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-rw-r--r--pkgs/development/haskell-modules/configuration-nix.nix6
1 files changed, 5 insertions, 1 deletions
diff --git a/pkgs/development/haskell-modules/configuration-nix.nix b/pkgs/development/haskell-modules/configuration-nix.nix
index 5fc968ccddeba..1418a8d6fe82e 100644
--- a/pkgs/development/haskell-modules/configuration-nix.nix
+++ b/pkgs/development/haskell-modules/configuration-nix.nix
@@ -935,7 +935,11 @@ self: super: builtins.intersectAttrs super {
 
   rel8 = addTestToolDepend super.rel8 pkgs.postgresql;
 
-  cachix = generateOptparseApplicativeCompletion "cachix" super.cachix;
+  cachix = generateOptparseApplicativeCompletion "cachix" (super.cachix.override { nix = pkgs.nix_2_3; });
+
+  hercules-ci-agent = super.hercules-ci-agent.override { nix = pkgs.nix_2_3; };
+  hercules-ci-cnix-expr = super.hercules-ci-cnix-expr.override { nix = pkgs.nix_2_3; };
+  hercules-ci-cnix-store = super.hercules-ci-cnix-store.override { nix = pkgs.nix_2_3; };
 
   # Enable extra optimisations which increase build time, but also
   # later compiler performance, so we should do this for user's benefit.