@@ -87,7 +87,7 @@ let
87 # haskell.nix provides access to the nixpkgs pins which are used by our CI,
87 # haskell.nix provides access to the nixpkgs pins which are used by our CI,
88 # hence you will be more likely to get cache hits when using these.
88 # hence you will be more likely to get cache hits when using these.
89 # But you can also just use your own, e.g. '<nixpkgs>'.
89 # But you can also just use your own, e.g. '<nixpkgs>'.
90− haskellNix.sources.nixpkgs-2009
90+ haskellNix.sources.nixpkgs-unstable
91 # These arguments passed to nixpkgs, include some patches and also
91 # These arguments passed to nixpkgs, include some patches and also
92 # the haskell.nix functionality itself as an overlay.
92 # the haskell.nix functionality itself as an overlay.
93 haskellNix.nixpkgsArgs;
93 haskellNix.nixpkgsArgs;