anchor.diff:          success=1
         done
         runHook postInstall
  -    '';
  +    ''
  +    else installPhase;
   
       meta = {
         inherit (erlang.meta) platforms;
  
positive.code:       runHook postBuild
      '';
  
      installPhase = ''
        runHook preInstall
        mkdir -p "$out/lib/erlang/lib/${name}-${version}"
        for reldir in src ebin priv include; do
  
negative.code: , buildInputs ? [], erlangDeps ? [], pluginDeps ? []
  , postPatch ? ""
  , compilePorts ? false
  , installPhase ? null
  , meta ? {}
  , ... }@attrs:
  
  