diff --git a/pkgs/by-name/ga/gammu/package.nix b/pkgs/by-name/ga/gammu/package.nix
index 9a112787d3b4..c5fd1b8a6325 100644
--- a/pkgs/by-name/ga/gammu/package.nix
+++ b/pkgs/by-name/ga/gammu/package.nix
@@ -45,6 +45,7 @@ stdenv.mkDerivation rec {
   ];
 
   cmakeFlags = [
+    "-DCMAKE_POLICY_VERSION_MINIMUM=3.5"
     # Fix build with CMake 4
     (lib.cmakeFeature "CMAKE_POLICY_VERSION_MINIMUM" "3.10")
   ];