diff --git a/pkgs/development/tools/pvs-studio/how-to-use-pvs-studio-free.nix b/pkgs/development/tools/pvs-studio/how-to-use-pvs-studio-free.nix

index 986e1360138b20984a3076a5a57715073d8c7980..ce1ae91f6beddd05b90f78158461d1b8beb1e9fb 100644

--- a/pkgs/development/tools/pvs-studio/how-to-use-pvs-studio-free.nix

+++ b/pkgs/development/tools/pvs-studio/how-to-use-pvs-studio-free.nix

@@ -10,7 +10,10 @@ src = sources.how-to-use-pvs-studio-free;

nativeBuildInputs = [ cmake ];

• postPatch = stdenv.lib.optionalString stdenv.cc.isClang ''

• postPatch = stdenv.lib.optionalString (!stdenv.isDarwin) ''

• substituteInPlace CMakeLists.txt \

•  --replace "set(CMAKE_INSTALL_PREFIX \"/usr\")" ""
  

• '' + stdenv.lib.optionalString stdenv.cc.isClang ''

 substituteInPlace CMakeLists.txt \

   --replace "stdc++fs" "c++fs"

'';