Index: scripts/taiseilib/version.py
--- scripts/taiseilib/version.py.orig
+++ scripts/taiseilib/version.py
@@ -77,6 +77,9 @@ def get(*, rootdir=None, fallback=VERSION_FALLBACK, ar
         return Version(version_str)
 
     try:
+        # XXX do not call git, use port-provided fallback instead
+        raise subprocess.SubprocessError("git external calls disabled")
+
         version_str = subprocess.check_output(
             shlex.split('git describe --dirty --match v[0-9]*[!asz]'),
             cwd=str(rootdir),
