writeTextFile: set meta.mainProgram based on destination

    , allowSubstitutes ? false

    , preferLocalBuild ? true

    }:

    let

      matches = builtins.match "/bin/([^/]+)" destination;

    in

    runCommand name

      { inherit text executable checkPhase meta allowSubstitutes preferLocalBuild;

      { inherit text executable checkPhase allowSubstitutes preferLocalBuild;

        passAsFile = [ "text" ];

        meta = lib.optionalAttrs (executable && matches != null) {

          mainProgram = lib.head matches;

        } // meta;

      }

      ''

        target=$out${lib.escapeShellArg destination}

  */

  writeScriptBin = name: text: writeTextFile {inherit name text; executable = true; destination = "/bin/${name}"; meta.mainProgram = name;};

  writeScriptBin = name: text: writeTextFile {inherit name text; executable = true; destination = "/bin/${name}";};

  /*

    Similar to writeScript. Writes a Shell script and checks its syntax.

      checkPhase = ''

        ${stdenv.shellDryRun} "$target"

      '';

      meta.mainProgram = name;

    };

  /*

          runHook postCheck

        ''

        else checkPhase;

      meta.mainProgram = name;

    };

  # Create a C binary