I started playing around with spack on my mac (I was trying to evaluate it when compared to brew) and I find it beatiful! 

I then decided to start using it on our cluster, but I had no luck with the latest version. After cloning spack from github, any time I try installing a package I get this error:

$ spack install dealii
Traceback (most recent call last):
  File "/home/mathlab/spack/bin/spack", line 176, in <module>
    main()
  File "/home/mathlab/spack/bin/spack", line 154, in main
    return_val = command(parser, args)
  File "/home/mathlab/spack/lib/spack/spack/cmd/install.py", line 74, in install
    with spack.installed_db.write_transaction():
  File "/home/mathlab/spack/lib/spack/spack/database.py", line 598, in __enter__
    if self._enter() and self._acquire_fn:
  File "/home/mathlab/spack/lib/spack/spack/database.py", line 616, in _enter
    return self._db.lock.acquire_write(self._timeout)
  File "/home/mathlab/spack/lib/spack/llnl/util/lock.py", line 123, in acquire_write
    self._lock(fcntl.LOCK_EX, timeout)   # can raise LockError.
  File "/home/mathlab/spack/lib/spack/llnl/util/lock.py", line 64, in _lock
    fcntl.lockf(self._fd, op | fcntl.LOCK_NB)
IOError: [Errno 38] Function not implemented