==> Installing mpifileutils
==> Searching for binary cache of mpifileutils
==> Fetching s3://uoregon/spack/build_cache/linux-ubuntu18.04-x86_64/gcc-7.3.0/mpifileutils-develop/linux-ubuntu18.04-x86_64-gcc-7.3.0-mpifileutils-develop-4lo3yspw6662oc2o6oj7iv77kdnh6vtt.spack
==> Installing mpifileutils from binary cache
gpg: Signature made Sat Dec 21 17:23:01 2019 UTC
gpg:                using RSA key 7D344E2992071B0AAAE1EDB0E68DE2A80314303D
gpg: Good signature from "prl" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: 7D34 4E29 9207 1B0A AAE1  EDB0 E68D E2A8 0314 303D
==> Relocating package from
  /super/absurdly/ridiculously/obnoxiously/long/path/for/relocation to /super/absurdly/ridiculously/obnoxiously/long/path/for/relocation.
==> Successfully installed mpifileutils from binary cache
[+] /super/absurdly/ridiculously/obnoxiously/long/path/for/relocation/linux-ubuntu18.04-x86_64/gcc-7.3.0/mpifileutils-develop-4lo3yspw6662oc2o6oj7iv77kdnh6vtt
==> Error: name 'pwd' is not defined

    def configure_args(self):
        ...
        args.append("CPPFLAGS=-I%s/src/common" % pwd())
        ...