diff --git a/pre_commit/resources/ruby-build.tar.gz b/pre_commit/resources/ruby-build.tar.gz
index 4412ed40f..c131f4a93 100644
Binary files a/pre_commit/resources/ruby-build.tar.gz and b/pre_commit/resources/ruby-build.tar.gz differ
diff --git a/pre_commit/make_archives.py b/testing/make-archives
old mode 100644
new mode 100755
similarity index 75%
rename from pre_commit/make_archives.py
rename to testing/make-archives
index d320b830d..ae7d58462
--- a/pre_commit/make_archives.py
+++ b/testing/make-archives
@@ -1,14 +1,13 @@
+#!/usr/bin/env python3
 import argparse
 import os.path
+import shutil
+import subprocess
 import tarfile
+import tempfile
 from typing import Optional
 from typing import Sequence
 
-from pre_commit import output
-from pre_commit.util import cmd_output_b
-from pre_commit.util import rmtree
-from pre_commit.util import tmpdir
-
 
 # This is a script for generating the tarred resources for git repo
 # dependencies.  Currently it's just for "vendoring" ruby support packages.
@@ -16,7 +15,7 @@
 
 REPOS = (
     ('rbenv', 'git://github.com/rbenv/rbenv', '0843745'),
-    ('ruby-build', 'git://github.com/rbenv/ruby-build', '258455e'),
+    ('ruby-build', 'git://github.com/rbenv/ruby-build', '500863c'),
     (
         'ruby-download',
         'git://github.com/garnieretienne/rvm-download',
@@ -35,18 +34,18 @@ def make_archive(name: str, repo: str, ref: str, destdir: str) -> str:
     :param text destdir: Directory to place archives in.
     """
     output_path = os.path.join(destdir, f'{name}.tar.gz')
-    with tmpdir() as tempdir:
+    with tempfile.TemporaryDirectory() as tmpdir:
         # Clone the repository to the temporary directory
-        cmd_output_b('git', 'clone', repo, tempdir)
-        cmd_output_b('git', 'checkout', ref, cwd=tempdir)
+        subprocess.check_call(('git', 'clone', repo, tmpdir))
+        subprocess.check_call(('git', '-C', tmpdir, 'checkout', ref))
 
         # We don't want the '.git' directory
         # It adds a bunch of size to the archive and we don't use it at
         # runtime
-        rmtree(os.path.join(tempdir, '.git'))
+        shutil.rmtree(os.path.join(tmpdir, '.git'))
 
         with tarfile.open(output_path, 'w|gz') as tf:
-            tf.add(tempdir, name)
+            tf.add(tmpdir, name)
 
     return output_path
 
@@ -56,7 +55,7 @@ def main(argv: Optional[Sequence[str]] = None) -> int:
     parser.add_argument('--dest', default='pre_commit/resources')
     args = parser.parse_args(argv)
     for archive_name, repo, ref in REPOS:
-        output.write_line(f'Making {archive_name}.tar.gz for {repo}@{ref}')
+        print(f'Making {archive_name}.tar.gz for {repo}@{ref}')
         make_archive(archive_name, repo, ref, args.dest)
     return 0
 
diff --git a/tests/make_archives_test.py b/tests/make_archives_test.py
deleted file mode 100644
index 6ae2f8e74..000000000
--- a/tests/make_archives_test.py
+++ /dev/null
@@ -1,46 +0,0 @@
-import tarfile
-
-from pre_commit import git
-from pre_commit import make_archives
-from pre_commit.util import cmd_output
-from testing.util import git_commit
-
-
-def test_make_archive(in_git_dir, tmpdir):
-    output_dir = tmpdir.join('output').ensure_dir()
-    # Add a files to the git directory
-    in_git_dir.join('foo').ensure()
-    cmd_output('git', 'add', '.')
-    git_commit()
-    # We'll use this rev
-    head_rev = git.head_rev('.')
-    # And check that this file doesn't exist
-    in_git_dir.join('bar').ensure()
-    cmd_output('git', 'add', '.')
-    git_commit()
-
-    # Do the thing
-    archive_path = make_archives.make_archive(
-        'foo', in_git_dir.strpath, head_rev, output_dir.strpath,
-    )
-
-    expected = output_dir.join('foo.tar.gz')
-    assert archive_path == expected.strpath
-    assert expected.exists()
-
-    extract_dir = tmpdir.join('extract').ensure_dir()
-    with tarfile.open(archive_path) as tf:
-        tf.extractall(extract_dir.strpath)
-
-    # Verify the contents of the tar
-    assert extract_dir.join('foo').isdir()
-    assert extract_dir.join('foo/foo').exists()
-    assert not extract_dir.join('foo/.git').exists()
-    assert not extract_dir.join('foo/bar').exists()
-
-
-def test_main(tmpdir):
-    make_archives.main(('--dest', tmpdir.strpath))
-
-    for archive, _, _ in make_archives.REPOS:
-        assert tmpdir.join(f'{archive}.tar.gz').exists()