anchor.diff:  
   let params =
     if stdenv.lib.versionAtLeast coq.coq-version "8.7" then {
  -    version = "3.2.0";
  -    sha256 = "15bi36x7zj0glsb3s2gwqd4wswhfzh36rbp7imbyff53a7nna95l";
  +    version = "3.3.1";
  +    sha256 = "0k1nfgiszmai5dihhpfa5mgq9rwigl0n38dw10jn79x89xbdpyh5";
     } else {
       version = "2.6.1";
  -    sha256 = "1y4czkfrd8p37vwv198nns4hz1brfv71na17pxsidwpxy7qnyfw1";
  +    sha256 = "0q5a038ww5dn72yvwn5298d3ridkcngb1dik8hdyr3xh7gr5qibj";
     }
   ; in
   
  
positive.code:   ]);
  
    buildPhase = ''
      ${bash}/bin/bash autogen.sh
      ${bash}/bin/bash configure --libdir=$out/lib/coq/${coq.coq-version}/user-contrib/Flocq
      ./remake
    '';
  
negative.code:   };
  
    passthru = {
      compatibleCoqVersions = v: builtins.elem v [ "8.5" "8.6" "8.7" "8.8" "8.9" "8.10" "8.11" "8.12" ];
    };
  }
  