anchor.diff:      "-DWITH_PARTITION_STORAGE_ENGINE=1"
       "-DWITHOUT_EXAMPLE_STORAGE_ENGINE=1"
       "-DWITHOUT_FEDERATED_STORAGE_ENGINE=1"
  -    "-DSECURITY_HARDENED=ON"
       "-DWITH_WSREP=ON"
  -  ] ++ stdenv.lib.optionals stdenv.isDarwin [
  -    "-DWITHOUT_OQGRAPH_STORAGE_ENGINE=1"
  -    "-DWITHOUT_TOKUDB=1"
  -    "-DCURSES_LIBRARY=${ncurses}/lib/libncurses.dylib"
     ];
   
  -  # fails to find lex_token.h sometimes
  -  enableParallelBuilding = true;
  +  postInstall = common.postInstall + ''
  +    rm -r "$out"/{mysql-test,sql-bench,data} # Don't need testing data
  +    rm "$out"/share/man/man1/mysql-test-run.pl.1
   
  -  outputs = [ "out" "lib" ];
  +    # Don't install mysqlbug to prevent a dependency on gcc.
  +    rm $out/bin/mysqlbug
  +  '';
  +});
   
  -  prePatch = ''
  -    substituteInPlace cmake/libutils.cmake \
  -      --replace /usr/bin/libtool libtool
  -    sed -i "s,SET(DEFAULT_MYSQL_HOME.*$,SET(DEFAULT_MYSQL_HOME /not/a/real/dir),g" CMakeLists.txt
  -    sed -i "s,SET(PLUGINDIR.*$,SET(PLUGINDIR $lib/lib/mysql/plugin),g" CMakeLists.txt
  -    sed -i 's,SET(SHAREDIR .*$,SET(SHAREDIR share/mysql),g' CMakeLists.txt
  +in mariadb
   
  -    sed -i "s,SET(pkgincludedir.*$,SET(pkgincludedir $lib/include),g" scripts/CMakeLists.txt
  -    sed -i "s,SET(pkglibdir.*$,SET(pkglibdir $lib/lib),g" scripts/CMakeLists.txt
  -    sed -i "s,SET(pkgplugindir.*$,SET(pkgplugindir $lib/lib/mysql/plugin),g" scripts/CMakeLists.txt
  -
  -    sed -i "s,set(libdir.*$,SET(libdir $lib/lib),g" storage/mroonga/vendor/groonga/CMakeLists.txt
  -    sed -i "s,set(includedir.*$,SET(includedir $lib/include),g" storage/mroonga/vendor/groonga/CMakeLists.txt
  -    sed -i "/\"\$[{]CMAKE_INSTALL_PREFIX}\/\$[{]GRN_RELATIVE_PLUGINS_DIR}\"/d" storage/mroonga/vendor/groonga/CMakeLists.txt
  -    sed -i "s,set(GRN_PLUGINS_DIR.*$,SET(GRN_PLUGINS_DIR $lib/\$\{GRN_RELATIVE_PLUGINS_DIR}),g" storage/mroonga/vendor/groonga/CMakeLists.txt
  -    sed -i 's,[^"]*/var/log,/var/log,g' storage/mroonga/vendor/groonga/CMakeLists.txt
  -  '';
  -
  -  postInstall = ''
  -    substituteInPlace $out/bin/mysql_install_db \
  -      --replace basedir=\"\" basedir=\"$out\"
  -
  -    # Remove superfluous files
  -    rm -r $out/mysql-test $out/sql-bench $out/data # Don't need testing data
  -    rm $out/share/man/man1/mysql-test-run.pl.1
  -    rm $out/bin/rcmysql # Not needed with nixos units
  -    rm $out/bin/mysqlbug # Encodes a path to gcc and not really useful
  -    find $out/bin -name \*test\* -exec rm {} \;
  -
  -    # Separate libs and includes into their own derivation
  -    mkdir -p $lib
  -    mv $out/lib $lib
  -    mv $out/include $lib
  -
  -  ''
  -  + stdenv.lib.optionalString stdenv.isDarwin ''
  -    # Fix library rpaths
  -    # TODO: put this in the stdenv to prepare for wide usage of multi-output derivations
  -    for file in $(grep -rl $out/lib $lib); do
  -      install_name_tool -delete_rpath $out/lib -add_rpath $lib $file
  -    done
  -
  -  '' + ''
  -    # Fix the mysql_config
  -    sed -i $out/bin/mysql_config \
  -      -e 's,-lz,-L${zlib}/lib -lz,g' \
  -      -e 's,-lssl,-L${openssl}/lib -lssl,g'
  -
  -    # Add mysql_config to libs since configure scripts use it
  -    mkdir -p $lib/bin
  -    cp $out/bin/mysql_config $lib/bin
  -    sed -i "/\(execdir\|bindir\)/ s,'[^\"']*',$lib/bin,g" $lib/bin/mysql_config
  -
  -    # Make sure to propagate lib for compatability
  -    mkdir -p $out/nix-support
  -    echo "$lib" > $out/nix-support/propagated-native-build-inputs
  -
  -    # Don't install static libraries.
  -    rm $lib/lib/libmysqlclient.a $lib/lib/libmysqld.a
  -  '';
  -
  -  passthru.mysqlVersion = "5.6";
  -
  -  meta = with stdenv.lib; {
  -    description = "An enhanced, drop-in replacement for MySQL";
  -    homepage    = https://mariadb.org/;
  -    license     = stdenv.lib.licenses.gpl2;
  -    maintainers = with stdenv.lib.maintainers; [ thoughtpolice wkennington ];
  -    platforms   = stdenv.lib.platforms.all;
  -  };
  -}
  
positive.code: { stdenv, fetchurl, cmake, ncurses, zlib, xz, lzo, lz4, bzip2, snappy
  , openssl, pcre, boost, judy, bison, libxml2
  , libaio, libevent, groff, jemalloc, cracklib, systemd, numactl, perl
  }:
  
  with stdenv.lib;
  stdenv.mkDerivation rec {
    name = "mariadb-${version}";
    version = "10.1.18";
  
    src = fetchurl {
  
negative.code:     sha256 = "0wrvhyck95czhz553834i9im7ljvn8k2byakcinlji7zx43njcyp";
    };
  
    prePatch = ''
      substituteInPlace cmake/libutils.cmake \
        --replace /usr/bin/libtool libtool
      sed -i 's,[^"]*/var/log,/var/log,g' storage/mroonga/vendor/groonga/CMakeLists.txt
    '';
  
    nativeBuildInputs = [ cmake pkgconfig ];
  
    buildInputs = [ ncurses openssl zlib pcre jemalloc libaio systemd ];
  
    cmakeFlags = [
      "-DBUILD_CONFIG=mysql_release"
      "-DMANUFACTURER=NixSap"
      "-DDEFAULT_CHARSET=utf8"
      "-DDEFAULT_COLLATION=utf8_general_ci"
      "-DSECURITY_HARDENED=ON"
  
      "-DMYSQL_UNIX_ADDR=/run/mysqld/mysqld.sock"
      "-DINSTALL_MYSQLSHAREDIR=share/mysql"
  
      "-DWITH_ZLIB=system"
      "-DWITH_SSL=system"
      "-DWITH_PCRE=system"
  
    ]
      ;
  
    preConfigure = ''
      cmakeFlags="$cmakeFlags -DINSTALL_INCLUDEDIR=''${!outputDev}/include/mysql"
    '';
  
    postInstall = ''
      rm "$out"/lib/*.a
      find "''${!outputBin}/bin" -name '*test*' -delete
    '';
  
    passthru.mysqlVersion = "5.6";
  };
  
  
  client = stdenv.mkDerivation (common // {
    name = "mariadb-client-${common.version}";
  
    outputs = [ "bin" "dev" "out" ];
  
    propagatedBuildInputs = [ openssl zlib ]; # required from mariadb.pc
  
    cmakeFlags = common.cmakeFlags ++ [
      "-DWITHOUT_SERVER=ON"
    ];
  
    preConfigure = common.preConfigure + ''
      cmakeFlags="$cmakeFlags \
        -DINSTALL_BINDIR=$bin/bin -DINSTALL_SCRIPTDIR=$bin/bin \
        -DINSTALL_SUPPORTFILESDIR=$bin/share/mysql \
        -DINSTALL_DOCDIR=$bin/share/doc/mysql -DINSTALL_DOCREADMEDIR=$bin/share/doc/mysql \
        "
    '';
  
    # prevent cycle; it needs to reference $dev
    postInstall = common.postInstall + ''
      moveToOutput bin/mysql_config "$dev"
    '';
  
    enableParallelBuilding = true; # the client should be OK
  });
  
  
  everything = stdenv.mkDerivation (common // {
    name = "mariadb-${common.version}";
  
    patches = [
      ./MDEV-10463.patch
    ];
  
    nativeBuildInputs = common.nativeBuildInputs ++ [ bison ];
  
    buildInputs = common.buildInputs ++ [
      xz lzo lz4 bzip2 snappy
      libxml2 boost judy libevent cracklib
    ]
      ++ optionals (stdenv.isLinux && !stdenv.isArm) [ numactl ]
      ;
  
    cmakeFlags = common.cmakeFlags ++ [
      "-DMYSQL_DATADIR=/var/lib/mysql"
      "-DINSTALL_SYSCONFDIR=etc/mysql"
      "-DINSTALL_INFODIR=share/mysql/docs"
      "-DINSTALL_MANDIR=share/man"
      "-DINSTALL_PLUGINDIR=lib/mysql/plugin"
      "-DINSTALL_SCRIPTDIR=bin"
      "-DINSTALL_SUPPORTFILESDIR=share/mysql"
      "-DINSTALL_DOCREADMEDIR=share/doc/mysql"
      "-DINSTALL_DOCDIR=share/doc/mysql"
      "-DINSTALL_SHAREDIR=share/mysql"
  
      "-DENABLED_LOCAL_INFILE=ON"
      "-DWITH_READLINE=ON"
      "-DWITH_EXTRA_CHARSETS=complex"
      "-DWITH_EMBEDDED_SERVER=ON"
      "-DWITH_ARCHIVE_STORAGE_ENGINE=1"
  