anchor.diff:  
       cmakeFlags = [
         "-DWITH_PYTHON3=ON"
  -      "-DWITH_SYSTEM_ROCKSDB=OFF"
  +      "-DWITH_SYSTEM_ROCKSDB=OFF"  # breaks Bluestore
         "-DCMAKE_INSTALL_DATADIR=${placeholder "lib"}/lib"
   
  -
         "-DWITH_SYSTEM_BOOST=ON"
  -      "-DWITH_SYSTEM_ROCKSDB=ON"
         "-DWITH_SYSTEM_GTEST=ON"
         "-DMGR_PYTHON_VERSION=${ceph-python-env.python.pythonVersion}"
         "-DWITH_SYSTEMD=OFF"
  
positive.code: , babeltrace, gperf
  , gtest
  , cunit, snappy
  , rocksdb, makeWrapper
  , leveldb, oathToolkit
  , libnl, libcap_ng
  , rdkafka
  
negative.code:     buildInputs = cryptoLibsMap.${cryptoStr} ++ [
        boost ceph-python-env libxml2 optYasm optLibatomic_ops optLibs3
        malloc zlib openldap lttng-ust babeltrace gperf gtest cunit
        snappy lz4 oathToolkit leveldb libnl libcap_ng rdkafka
      ] ++ lib.optionals stdenv.isLinux [
        linuxHeaders util-linux libuuid udev keyutils optLibaio optLibxfs optZfs
        # ceph 14
  