anchor.diff:  stdenv.mkDerivation (finalAttrs: {
     pname = "muon"
             + lib.optionalString embedSamurai "-embedded-samurai";
  -  version = "unstable-2022-09-24";
  +  version = "0.1.0";
   
     src = fetchFromSourcehut {
       name = "muon-src";
       owner = "~lattis";
       repo = "muon";
  -    rev = "f385c82a6104ea3341ca34756e2812d700bc43d8";
  -    hash = "sha256-Cr1r/sp6iVotU+n4bTzQiQl8Y+ShaqnnaWjL6gRW8p0=";
  +    rev = finalAttrs.version;
  +    hash = "sha256-m382/Y+qOYk7hHdDdOpiYWNWrqpnWPCG4AKGGkmLt4o=";
     };
  +
  +  outputs = [ "out" ] ++ lib.optionals buildDocs [ "man" ];
   
     nativeBuildInputs = [
       pkgconf
  
positive.code:   };
  })
  # TODO LIST:
  # 1. setup hook
  # 2. multiple outputs
  # 3. automate sources acquisition (especially wraps)
  # 4. tests
  
negative.code:     # URLs manually extracted from subprojects directory
      meson-docs-wrap = fetchurl {
        name = "meson-docs-wrap";
        url = "https://mochiro.moe/wrap/meson-docs-0.63.0-239-g41a05ff93.tar.gz";
        hash = "sha256-wg2mDkrkE1xVNXJf4sVm6cN1ozVeDbbw0CBYtixg5/Q=";
      };
  
      samurai-wrap = fetchurl {
  