diff --git a/pkgs/development/coq-modules/corn/default.nix b/pkgs/development/coq-modules/corn/default.nix
index 660dbabde284..56141662db9e 100644
--- a/pkgs/development/coq-modules/corn/default.nix
+++ b/pkgs/development/coq-modules/corn/default.nix
@@ -40,13 +40,13 @@
       }
     ] null;
   release = {
-    "8.8.1".sha256 = "0gh32j0f18vv5lmf6nb87nr5450w6ai06rhrnvlx2wwi79gv10wp";
-    "8.12.0".sha256 = "0b92vhyzn1j6cs84z2182fn82hxxj0bqq7hk6cs4awwb3vc7dkhi";
-    "8.13.0".sha256 = "1wzr7mdsnf1rq7q0dvmv55vxzysy85b00ahwbs868bl7m8fk8x5b";
-    "8.16.0".sha256 = "sha256-ZE/EEIndxHfo/9Me5NX4ZfcH0ZAQ4sRfZY7LRZfLXBQ=";
-    "8.18.0".sha256 = "sha256-ow3mfarZ1PvBGf5WLnI8LdF3E+8A6fN7cOcXHrZJLo0=";
-    "8.19.0".sha256 = "sha256-h5MlfRuv2hTbxGmpLUEGQO1YqQTwUNEHZzCfvdOU1TA=";
-    "8.20.0".sha256 = "sha256-tl68REU6xTbSOzhPucQPd9A3YnnaMNbSY8gl4Seyp10=";
+    "8.8.1".hash = "sha256:0gh32j0f18vv5lmf6nb87nr5450w6ai06rhrnvlx2wwi79gv10wp";
+    "8.12.0".hash = "sha256:0b92vhyzn1j6cs84z2182fn82hxxj0bqq7hk6cs4awwb3vc7dkhi";
+    "8.13.0".hash = "sha256:1wzr7mdsnf1rq7q0dvmv55vxzysy85b00ahwbs868bl7m8fk8x5b";
+    "8.16.0".hash = "sha256-ZE/EEIndxHfo/9Me5NX4ZfcH0ZAQ4sRfZY7LRZfLXBQ=";
+    "8.18.0".hash = "sha256-ow3mfarZ1PvBGf5WLnI8LdF3E+8A6fN7cOcXHrZJLo0=";
+    "8.19.0".hash = "sha256-h5MlfRuv2hTbxGmpLUEGQO1YqQTwUNEHZzCfvdOU1TA=";
+    "8.20.0".hash = "sha256-tl68REU6xTbSOzhPucQPd9A3YnnaMNbSY8gl4Seyp10=";
   };
 
   configureScript = "./configure.sh";