1 files changed, 2 insertions, 2 deletions
diff --git a/pkgs/development/coq-modules/mathcomp-bigenough/default.nix b/pkgs/development/coq-modules/mathcomp-bigenough/default.nix
index fa4a2aaeddb..e1f58edc9cb 100644
--- a/pkgs/development/coq-modules/mathcomp-bigenough/default.nix
+++ b/pkgs/development/coq-modules/mathcomp-bigenough/default.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ coq ];
   propagatedBuildInputs = [ mathcomp ];
 
-  installFlags = "COQLIB=$(out)/lib/coq/${coq.coq-version}/";
+  installFlags = "-f Makefile.coq COQLIB=$(out)/lib/coq/${coq.coq-version}/";
 
   meta = {
     description = "A small library to do epsilon - N reasonning";
@@ -24,6 +24,6 @@ stdenv.mkDerivation rec {
   };
 
   passthru = {
-    compatibleCoqVersions = v: builtins.elem v [ "8.5" "8.6" "8.7" "8.8" ];
+    compatibleCoqVersions = v: builtins.elem v [ "8.5" "8.6" "8.7" "8.8" "8.9" ];
   };
 }