Python failure during build - setuptools pip wheel failed with error code 1

[twilco]

When trying to ./mach check a fresh clone of Servo, I encountered the below failure:

error: failed to run custom build command for `mozjs_sys v0.67.1 (https://github.com/servo/mozjs?rev=59065889ec7726b767d70b8702b43b4e4776cbfe#59065889)`

Caused by:
  process didn't exit successfully: `/home/twilco/projects/servo/target/debug/build/mozjs_sys-2afaddc10560323e/build-script-build` (exit code: 101)
--- stdout
cargo:rerun-if-env-changed=MAKE
cargo:rerun-if-env-changed=MOZTOOLS_PATH
[[ /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/configure -ot /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/configure.in ]] && touch /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/configure || true
[[ /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/old-configure -ot /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/old-configure.in ]] && touch /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/old-configure || true
! [[ /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/configure.in -ot /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/configure ]] && touch /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/configure || true
! [[ /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/old-configure.in -ot /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/old-configure ]] && touch /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/old-configure || true
if [[ /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/configure -nt /home/twilco/projects/servo/target/debug/build/mozjs_sys-a2af02b693aea2e3/out/config.status ]] ; then \
  cd /home/twilco/projects/servo/target/debug/build/mozjs_sys-a2af02b693aea2e3/out && \
  PYTHON="python2" MOZ_TOOLS="" \
  CC="gcc" CFLAGS="" \
  CPP="gcc -E" CPPFLAGS="" \
  CXX="g++" CXXFLAGS="" \
  AS="" AR="ar" \
  STLPORT_LIBS="" \
  RUST_TARGET="x86_64-unknown-linux-gnu" RUST_HOST="x86_64-unknown-linux-gnu" \
  RUST_SYSROOT="" \
  /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/configure --disable-jemalloc --disable-js-shell --disable-tests --disable-shared-js --build-backends=RecursiveMake --enable-posix-nspr-emulation --disable-shared-js || (cat config.log && exit 1) ; \
fi
Creating Python environment
Using real prefix '/usr'
New python executable in /home/twilco/projects/servo/target/debug/build/mozjs_sys-a2af02b693aea2e3/out/_virtualenvs/init/bin/python2
Not overwriting existing python script /home/twilco/projects/servo/target/debug/build/mozjs_sys-a2af02b693aea2e3/out/_virtualenvs/init/bin/python (you must use /home/twilco/projects/servo/target/debug/build/mozjs_sys-a2af02b693aea2e3/out/_virtualenvs/init/bin/python2)
Installing setuptools, pip, wheel...
  Complete output from command /home/twilco/project...nvs/init/bin/python2 - setuptools pip wheel:
  Collecting setuptools
  Could not find a version that satisfies the requirement setuptools (from versions: )
No matching distribution found for setuptools
----------------------------------------
...Installing setuptools, pip, wheel...done.
Traceback (most recent call last):
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/third_party/python/virtualenv/virtualenv.py", line 2349, in <module>
    main()
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/third_party/python/virtualenv/virtualenv.py", line 712, in main
    symlink=options.symlink)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/third_party/python/virtualenv/virtualenv.py", line 953, in create_environment
    download=download,
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/third_party/python/virtualenv/virtualenv.py", line 904, in install_wheel
    call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/third_party/python/virtualenv/virtualenv.py", line 796, in call_subprocess
    % (cmd_desc, proc.returncode))
OSError: Command /home/twilco/project...nvs/init/bin/python2 - setuptools pip wheel failed with error code 1
INFO: Creating Python environment
INFO: Using real prefix '/usr'
INFO: New python executable in /home/twilco/projects/servo/target/debug/build/mozjs_sys-a2af02b693aea2e3/out/_virtualenvs/init/bin/python2
INFO: Not overwriting existing python script /home/twilco/projects/servo/target/debug/build/mozjs_sys-a2af02b693aea2e3/out/_virtualenvs/init/bin/python (you must use /home/twilco/projects/servo/target/debug/build/mozjs_sys-a2af02b693aea2e3/out/_virtualenvs/init/bin/python2)
INFO: Installing setuptools, pip, wheel...
INFO:   Complete output from command /home/twilco/project...nvs/init/bin/python2 - setuptools pip wheel:
INFO:   Collecting setuptools
INFO:   Could not find a version that satisfies the requirement setuptools (from versions: )
INFO: No matching distribution found for setuptools
INFO: ----------------------------------------
INFO: ...Installing setuptools, pip, wheel...done.
INFO: Traceback (most recent call last):
INFO:   File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/third_party/python/virtualenv/virtualenv.py", line 2349, in <module>
INFO:     main()
INFO:   File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/third_party/python/virtualenv/virtualenv.py", line 712, in main
INFO:     symlink=options.symlink)
INFO:   File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/third_party/python/virtualenv/virtualenv.py", line 953, in create_environment
INFO:     download=download,
INFO:   File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/third_party/python/virtualenv/virtualenv.py", line 904, in install_wheel
INFO:     call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
INFO:   File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/third_party/python/virtualenv/virtualenv.py", line 796, in call_subprocess
INFO:     % (cmd_desc, proc.returncode))
INFO: OSError: Command /home/twilco/project...nvs/init/bin/python2 - setuptools pip wheel failed with error code 1

--- stderr
Traceback (most recent call last):
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/../../configure.py", line 132, in <module>
    sys.exit(main(sys.argv))
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/js/src/../../configure.py", line 38, in main
    sandbox.run(os.path.join(os.path.dirname(__file__), 'moz.configure'))
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/configure/__init__.py", line 431, in run
    self.include_file(path)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/configure/__init__.py", line 422, in include_file
    exec_(code, self)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/util.py", line 59, in exec_
    exec(object, globals, locals)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/moz.configure", line 7, in <module>
    include('build/moz.configure/init.configure')
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/configure/__init__.py", line 745, in include_impl
    self.include_file(what)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/configure/__init__.py", line 422, in include_file
    exec_(code, self)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/util.py", line 59, in exec_
    exec(object, globals, locals)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/build/moz.configure/init.configure", line 212, in <module>
    @imports('distutils.sysconfig')
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/configure/__init__.py", line 728, in decorator
    depends = DependsFunction(self, func, dependencies, when=when)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/configure/__init__.py", line 125, in __init__
    sandbox._value_for(self)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/configure/__init__.py", line 525, in _value_for
    return self._value_for_depends(obj)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/util.py", line 947, in method_call
    cache[args] = self.func(instance, *args)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/configure/__init__.py", line 534, in _value_for_depends
    value = obj.result()
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/util.py", line 947, in method_call
    cache[args] = self.func(instance, *args)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/configure/__init__.py", line 151, in result
    return self._func(*resolved_args)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/configure/__init__.py", line 1097, in wrapped
    return new_func(*args, **kwargs)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/build/moz.configure/init.configure", line 261, in virtualenv_python
    manager.build(python)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/virtualenv.py", line 473, in build
    self.create(python)
  File "/home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/mozjs/python/mozbuild/mozbuild/virtualenv.py", line 212, in create
    'Failed to create virtualenv: %s' % self.virtualenv_root)
Exception: Failed to create virtualenv: /home/twilco/projects/servo/target/debug/build/mozjs_sys-a2af02b693aea2e3/out/_virtualenvs/init
make: *** [makefile.cargo:197: maybe-configure] Error 1
thread 'main' panicked at 'assertion failed: result.success()', /home/twilco/.cargo/git/checkouts/mozjs-fa11ffc7d4f1cc2d/5906588/build.rs:133:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

warning: build failed, waiting for other jobs to finish...
error: build failed

The actual error that seems to be causing this is: INFO: OSError: Command /home/twilco/project...nvs/init/bin/python2 - setuptools pip wheel failed with error code 1. I tried some of the things in this thread, such as downgrading my Python 2 version to 2.7.9 and downgrading to virtualenv 15.1.0 via conda, but had no luck.

Anyone know how to resolve this? I'm running Manjaro Linux.