diff --git a/pkgs/development/coq-modules/coq-ext-lib/default.nix b/pkgs/development/coq-modules/coq-ext-lib/default.nix
index 2eeb6b207b1..d35c062d6e4 100644
--- a/pkgs/development/coq-modules/coq-ext-lib/default.nix
+++ b/pkgs/development/coq-modules/coq-ext-lib/default.nix
@@ -1,9 +1,10 @@
 { stdenv, fetchFromGitHub, coq }:
 
 let param =
-  if coq.coq-version == "8.4"
-  then { version = "0.9.0"; sha256 = "1n3bk003vvbghbrxkhal6drnc0l65jv9y77wd56is3jw9xgiif0w"; }
-  else { version = "0.9.0-beta3"; sha256 = "1dya0sqp5jjb2cl7cv2ry4gvcr359bkzzqcz0plknf3f1c5zrv0s"; };
+  {
+    "8.4" = { version = "0.9.0"; sha256 = "1n3bk003vvbghbrxkhal6drnc0l65jv9y77wd56is3jw9xgiif0w"; };
+    "8.5" = { version = "0.9.3"; sha256 = "05zff5mrkxpvcsw4gi8whjj5w0mdbqzjmb247lq5b7mry0bypwc5"; };
+  }."${coq.coq-version}";
 in
 
 stdenv.mkDerivation rec {