diff --git a/pkgs/development/coq-modules/fourcolor/default.nix b/pkgs/development/coq-modules/fourcolor/default.nix
index 3d2bda0b3d4e..3dfa427a2f7a 100644
--- a/pkgs/development/coq-modules/fourcolor/default.nix
+++ b/pkgs/development/coq-modules/fourcolor/default.nix
@@ -12,14 +12,14 @@ mkCoqDerivation {
 
   releaseRev = v: "v${v}";
 
-  release."1.2.3".sha256 = "sha256-gwKfUa74fIP7j+2eQgnLD7AswjCtOFGHGaIWb4qI0n4=";
-  release."1.2.4".sha256 = "sha256-iSW2O1kuunvOqTolmGGXmsYTxo2MJYCdW3BnEhp6Ksg=";
-  release."1.2.5".sha256 = "sha256-3qOPNCRjGK2UdHGMSqElpIXhAPVCklpeQgZwf9AFals=";
-  release."1.3.0".sha256 = "sha256-h9pa6vaKT6jCEaIdEdcu0498Ou5kEXtZdb9P7WXK1DQ=";
-  release."1.3.1".sha256 = "sha256-wBizm1hJXPYBu0tHFNScQHd22FebsJYoggT5OlhY/zM=";
-  release."1.4.0".sha256 = "sha256-8TtNPEbp3uLAH+MjOKiTZHOjPb3vVYlabuqsdWxbg80=";
-  release."1.4.1".sha256 = "sha256-0UASpo9CdpvidRv33BDWrevo+NSOhxLQFPCJAWPXf+s=";
-  release."1.4.2".sha256 = "sha256-d5J8j8gi6siwCLevM6y8Hf2rTB/HEfh72LLk0Qlzr0c=";
+  release."1.2.3".hash = "sha256-gwKfUa74fIP7j+2eQgnLD7AswjCtOFGHGaIWb4qI0n4=";
+  release."1.2.4".hash = "sha256-iSW2O1kuunvOqTolmGGXmsYTxo2MJYCdW3BnEhp6Ksg=";
+  release."1.2.5".hash = "sha256-3qOPNCRjGK2UdHGMSqElpIXhAPVCklpeQgZwf9AFals=";
+  release."1.3.0".hash = "sha256-h9pa6vaKT6jCEaIdEdcu0498Ou5kEXtZdb9P7WXK1DQ=";
+  release."1.3.1".hash = "sha256-wBizm1hJXPYBu0tHFNScQHd22FebsJYoggT5OlhY/zM=";
+  release."1.4.0".hash = "sha256-8TtNPEbp3uLAH+MjOKiTZHOjPb3vVYlabuqsdWxbg80=";
+  release."1.4.1".hash = "sha256-0UASpo9CdpvidRv33BDWrevo+NSOhxLQFPCJAWPXf+s=";
+  release."1.4.2".hash = "sha256-d5J8j8gi6siwCLevM6y8Hf2rTB/HEfh72LLk0Qlzr0c=";
 
   inherit version;
   defaultVersion =