diff --git a/pkgs/by-name/fl/flopoco/package.nix b/pkgs/by-name/fl/flopoco/package.nix
index b2e81c17764c..6d32636b1098 100644
--- a/pkgs/by-name/fl/flopoco/package.nix
+++ b/pkgs/by-name/fl/flopoco/package.nix
@@ -74,6 +74,10 @@ stdenv.mkDerivation {
     ./flopoco BuildAutocomplete
   '';
 
+  cmakeFlags = [
+    (lib.cmakeFeature "CMAKE_POLICY_VERSION_MINIMUM" "3.5")
+  ];
+
   installPhase = ''
     runHook preInstall