diff --git a/nix/sources.json b/nix/sources.json
index 9a0b696..2eec24b 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -29,10 +29,10 @@
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "c777cdf5c564015d5f63b09cc93bef4178b19b01",
-        "sha256": "0r2xhflcy5agaz4a3b8pxiyiwh32s1kl3swv73flnj1x3v69s8bm",
+        "rev": "6512b21eabb4d52e87ea2edcf31a288e67b2e4f8",
+        "sha256": "1kc31gblm51459a2hrq2ni5ilw47nybgizcr9i5agmc1lvadc8mi",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/c777cdf5c564015d5f63b09cc93bef4178b19b01.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/6512b21eabb4d52e87ea2edcf31a288e67b2e4f8.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }