output

Copying fixtures.egg-info to build/bdist.linux-x86_64/wheel/fixtures-3.0.0-py2.7.egg-info
running install_scripts
creating build/bdist.linux-x86_64/wheel/fixtures-3.0.0.dist-info/WHEEL
installing
/tmp/nix-build-python2.7-python2.7-fixtures-3.0.0.drv-0/fixtures-3.0.0/dist /tmp/nix-build-python2.7-python2.7-fixtures-3.0.0.drv-0/fixtures-3.0.0
Processing ./fixtures-3.0.0-py2.py3-none-any.whl
Requirement already satisfied: six in /nix/store/83l2753z8sal9hy89x6s3dkxrz5nnykn-python2.7-six-1.10.0/lib/python2.7/site-packages (from fixtures==3.0.0)
Collecting testtools>=0.9.22 (from fixtures==3.0.0)
  Could not find a version that satisfies the requirement testtools>=0.9.22 (from fixtures==3.0.0) (from versions: )
No matching distribution found for testtools>=0.9.22 (from fixtures==3.0.0)
builder for ‘/nix/store/5wm1cqnr90cfm57hak4ydrsa5a3nsmdm-python2.7-python2.7-fixtures-3.0.0.drv’ failed with exit code 1
error: build of ‘/nix/store/5wm1cqnr90cfm57hak4ydrsa5a3nsmdm-python2.7-python2.7-fixtures-3.0.0.drv’ failed
/root/.nix-profile/bin/nix-shell: failed to build all dependencies

requirements_override.nix

  "fixtures" = python.overrideDerivation super."fixtures" (old: rec {
    propagatedBuildInputs = [
      self."docutils"
      self."mock"
      self."pbr"
      self."six"
    ];
    propagatedNativeBuildInputs = propagatedBuildInputs;
  });