anchor.diff:      patches = [
         # Patch added by the mamba team
         (fetchpatch {
  -        url = "https://raw.githubusercontent.com/mamba-org/boa-forge/f766da0cc18701c4d107a41de22417a65b53cc2d/libsolv/add_strict_repo_prio_rule.patch";
  +        url = "https://raw.githubusercontent.com/mamba-org/boa-forge/20530f80e2e15012078d058803b6e2c75ed54224/libsolv/add_strict_repo_prio_rule.patch";
           sha256 = "19c47i5cpyy88nxskf7k6q6r43i55w61jvnz7fc2r84hpjkcrv7r";
         })
         # Patch added by the mamba team
         (fetchpatch {
  -        url = "https://raw.githubusercontent.com/mamba-org/boa-forge/f766da0cc18701c4d107a41de22417a65b53cc2d/libsolv/conda_variant_priorization.patch";
  +        url = "https://raw.githubusercontent.com/mamba-org/boa-forge/20530f80e2e15012078d058803b6e2c75ed54224/libsolv/conda_variant_priorization.patch";
           sha256 = "1iic0yx7h8s662hi2jqx68w5kpyrab4fr017vxd4wyxb6wyk35dd";
  -      })
  -      # Patch added by the mamba team
  -      (fetchpatch {
  -        url = "https://raw.githubusercontent.com/mamba-org/boa-forge/f766da0cc18701c4d107a41de22417a65b53cc2d/libsolv/memcpy_to_memmove.patch";
  -        sha256 = "1c9ir40l6crcxllj5zwhzbrbgibwqaizyykd0vip61gywlfzss64";
  -      })
  -    ];
  -  });
  -
  -  # fails linking with yaml-cpp 0.7.x
  -  libyamlcpp' = libyamlcpp.overrideAttrs (oldAttrs: rec {
  -
  -    version = "0.6.3";
  -
  -    src = fetchFromGitHub {
  -      owner = "jbeder";
  -      repo = "yaml-cpp";
  -      rev = "yaml-cpp-${version}";
  -      sha256 = "0ykkxzxcwwiv8l8r697gyqh1nl582krpvi7m7l6b40ijnk4pw30s";
  -    };
  -
  -    patches = [
  -      (fetchpatch {
  -        url = "https://github.com/jbeder/yaml-cpp/commit/4f48727b365962e31451cd91027bd797bc7d2ee7.patch";
  -        sha256 = "sha256-jarZAh7NgwL3xXzxijDiAQmC/EC2WYfNMkYHEIQBPhM=";
         })
       ];
     });
   in
   stdenv.mkDerivation rec {
     pname = "micromamba";
  -  version = "0.15.0";
  +  version = "0.18.1";
   
     src = fetchFromGitHub {
       owner = "mamba-org";
       repo = "mamba";
       rev = version;
  -    sha256 = "1zksp4zqj4wn9p9jb1qx1acajaz20k9xnm80yi7bab2d37y18hcw";
  +    sha256 = "1gr9r257l300hafp8zm61bn58rysdk9i4wv1879q96b6n6v8hwa6";
     };
   
     nativeBuildInputs = [ cmake ];
  
positive.code:     nlohmann_json
      curl
      libarchive
      libyamlcpp'
      libsolv'
      reproc
      # python3Packages.pybind11 # Would be necessary if someone wants to build with bindings I guess.
    ];
  
    cmakeFlags = [
      "-DBUILD_BINDINGS=OFF" # Fails to build, I don't think it's necessary for now.
      "-DBUILD_EXE=ON"
    ];
  
    CXXFLAGS = "-DMAMBA_USE_STD_FS";
  
    meta = with lib; {
      description = "Reimplementation of the conda package manager";
      homepage = "https://github.com/mamba-org/mamba";
      license = licenses.bsd3;
      maintainers = with maintainers; [ mausch ];
    };
  }
  
negative.code: { lib, stdenv, fetchFromGitHub, fetchpatch, cmake
  , cli11, nlohmann_json, curl, libarchive, libyamlcpp, libsolv, reproc, spdlog, termcolor, ghc_filesystem
  }:
  
  let
  