diff --git a/installer.py b/installer.py
index 67390b382..6437c1e0f 100644
--- a/installer.py
+++ b/installer.py
@@ -166,8 +166,9 @@ def pip(arg: str, ignore: bool = False, quiet: bool = False):
     arg = arg.replace('>=', '==')
     if not quiet:
         log.info(f'Installing package: {arg.replace("install", "").replace("--upgrade", "").replace("--no-deps", "").replace("--force", "").replace("  ", " ").strip()}')
-    log.debug(f"Running pip: {arg}")
-    result = subprocess.run(f'"{sys.executable}" -m pip {arg}', shell=True, check=False, env=os.environ, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    env_args = os.environ.get("PIP_EXTRA_ARGS", "")
+    log.debug(f"Running pip: {arg} {env_args}")
+    result = subprocess.run(f'"{sys.executable}" -m pip {arg} {env_args}', shell=True, check=False, env=os.environ, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     txt = result.stdout.decode(encoding="utf8", errors="ignore")
     if len(result.stderr) > 0:
         txt += ('\n' if len(txt) > 0 else '') + result.stderr.decode(encoding="utf8", errors="ignore")