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-rw-r--r--pkgs/development/coq-modules/equations/default.nix8
1 files changed, 7 insertions, 1 deletions
diff --git a/pkgs/development/coq-modules/equations/default.nix b/pkgs/development/coq-modules/equations/default.nix
index 3f049eed34be..1bc66fcf272a 100644
--- a/pkgs/development/coq-modules/equations/default.nix
+++ b/pkgs/development/coq-modules/equations/default.nix
@@ -19,8 +19,14 @@ let
       rev = "v1.0-8.8";
       sha256 = "0dd7zd5j2sv5cw3mfwg33ss2vcj634q3qykakc41sv7f3rfgqfnn";
     };
+
+    "8.9" = {
+      version = "1.2beta";
+      rev = "v1.2-beta-8.9";
+      sha256 = "1sj7vyarmvp1w5kvbhgpgap1yd0yrj4n1jrla0wv70k0jrq5hhpz";
+    };
   };
-  param = params."${coq.coq-version}";
+  param = params."${coq.coq-version}" or params."8.8";
 in
 
 stdenv.mkDerivation rec {