anchor.diff: -{ lib, stdenv
  +{ lib
  +, stdenv
   , fetchgit
   , wrapLisp
   , sbcl
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "clpm";
    version = "0.3.5";
  
    src = fetchgit {
      url = "https://gitlab.common-lisp.net/clpm/clpm";
      rev = "v${version}";
      fetchSubmodules = true;
      sha256 = "0jivnnp3z148yf4c2nzzr5whz76w5kjhsb97z2vs5maiwf79y2if";
    };
  
    buildInputs = [
  
negative.code:   ];
  
    buildPhase = ''
      runHook preBuild
  
      ln -s ${openssl.out}/lib/libcrypto.so.* .
      ln -s ${openssl.out}/lib/libssl.so.* .
      common-lisp.sh --script scripts/build.lisp
  
      runHook postBuild
    '';
  
    installPhase = ''
      runHook preInstall
  
      INSTALL_ROOT=$out sh install.sh
  
      runHook postInstall
    '';
  
    # fixupPhase results in fatal error in SBCL, `Can't find sbcl.core`
  