libxc: use upstream patch for cmake compatibility

pkgs/by-name/li/libxc/package.nix

@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitLab,
+  fetchpatch,
   cmake,
   gfortran,
   perl,
@@ -26,6 +27,14 @@ stdenv.mkDerivation rec {
     hash = versionHashes."${version}";
   };
 
+  patches = [
+    # Fix build with newer CMake versions
+    (fetchpatch {
+      url = "https://gitlab.com/libxc/libxc/-/commit/450202adb8a3d698841dca853f2999b1befd932e.patch";
+      sha256 = "sha256-XDt7+TzszSu+X6/PS+T8Q9BP76+bAXC9FzkA6ueo/OA=";
+    })
+  ];
+
   # Timeout increase has already been included upstream in master.
   # Check upon updates if this can be removed.
   postPatch = ''
@@ -49,7 +58,6 @@ stdenv.mkDerivation rec {
   '';
 
   cmakeFlags = [
-    "-DCMAKE_POLICY_VERSION_MINIMUM=3.5"
     "-DENABLE_FORTRAN=ON"
     "-DBUILD_SHARED_LIBS=ON"
     "-DENABLE_XHOST=OFF"