Build error on [email protected] and [email protected]

[aklinkert]

> [email protected] install /path/to/project/node_modules/weak
> node-gyp rebuild

make: Entering directory `/srv/www/crm/node_modules/weak/build'
  CXX(target) Release/obj.target/weakref/src/weakref.o
  SOLINK_MODULE(target) Release/obj.target/weakref.node
  COPY Release/weakref.node
cp: preserving permissions for ‘Release/weakref.node’: Operation not permitted
make: *** [Release/weakref.node] Error 1
make: Leaving directory `/srv/www/crm/node_modules/weak/build'
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/usr/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:270:23)
gyp ERR! stack     at ChildProcess.emit (events.js:110:17)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (child_process.js:1074:12)
gyp ERR! System Linux 3.16.0-30-generic
gyp ERR! command "node" "/usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /path/to/project/node_modules/weak
gyp ERR! node -v v0.12.5
gyp ERR! node-gyp -v v3.0.3
gyp ERR! not ok
npm WARN install:weak [email protected] install: `node-gyp rebuild`
npm WARN install:weak Exit status 1

Do you have any clue what's going wrong?