diff --git a/nix/sources.json b/nix/sources.json
index 1725af6c..7ca31a66 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -93,10 +93,10 @@
         "homepage": null,
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "7fe184a14a4ad4f0594c9b5ca8c7d0ac7c351296",
-        "sha256": "14gb0d85g3s04s6s3bbn91j6bni0k63vh6s3z5aq3yg7h49yf3v5",
+        "rev": "2f6fc07a5fa6f44799b6dce108e052adc2cf3783",
+        "sha256": "1gbcsq6s1k8i22ccxnrqx6xyy5hysj1jycgmjah77z47vpjgwg31",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/7fe184a14a4ad4f0594c9b5ca8c7d0ac7c351296.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/2f6fc07a5fa6f44799b6dce108e052adc2cf3783.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nvd": {
diff --git a/overlays/30-ghc.nix b/overlays/30-ghc.nix
index b8b2a181..48fa7235 100644
--- a/overlays/30-ghc.nix
+++ b/overlays/30-ghc.nix
@@ -21,7 +21,7 @@ let
         ;
     } // makeHaskellScriptPackages p;
     overrides = self: super: {
-      generic-optics = dontCheck super.generic-optics;
+      generic-optics = dontCheck (unmarkBroken super.generic-optics);
     };
   haskellPackages = master.haskellPackages.extend overrides;
   ghc = haskellPackages.ghc;