diff --git a/pkgs/development/coq-modules/metalib/default.nix b/pkgs/development/coq-modules/metalib/default.nix
index 4d62660a1045..2ffa68716a94 100644
--- a/pkgs/development/coq-modules/metalib/default.nix
+++ b/pkgs/development/coq-modules/metalib/default.nix
@@ -22,8 +22,8 @@
       }
     ] null;
   releaseRev = v: "coq${v}";
-  release."8.15".sha256 = "0wbp058zwa4bkdjj38aysy2g1avf9nrh8q23a3dil0q00qczi616";
-  release."8.10".sha256 = "0wbypc05d2lqfm9qaw98ynr5yc1p0ipsvyc3bh1rk9nz7zwirmjs";
+  release."8.15".hash = "sha256:0wbp058zwa4bkdjj38aysy2g1avf9nrh8q23a3dil0q00qczi616";
+  release."8.10".hash = "sha256:0wbypc05d2lqfm9qaw98ynr5yc1p0ipsvyc3bh1rk9nz7zwirmjs";
 
   meta = {
     license = lib.licenses.mit;