anchor.diff:          --replace "ggrep" "grep"
   
         substituteInPlace src/util/virpolkit.h \
  -        --replace '"/usr/bin/pkttyagent"' '"${polkit.bin}/bin/pkttyagent"'
  +        --replace '"/usr/bin/pkttyagent"' '"${if isLinux then polkit.bin else "/usr"}/bin/pkttyagent"'
   
         patchShebangs .
       ''
  
positive.code:     sed -i '0,/qemuxml2argvtest/{/qemuxml2argvtest/d;}' tests/meson.build
    '' + optionalString isDarwin ''
      sed -i '/qemucapabilitiestest/d' tests/meson.build
    '';
  
  
  
negative.code:       (feat "numactl" isLinux)
        (feat "numad" isLinux)
        (feat "pciaccess" isLinux)
        (feat "polkit" isLinux)
        (feat "readline" true)
        (feat "secdriver_apparmor" isLinux)
        (feat "tests" true)
  