diff --git a/spcd/__main__.py b/spcd/__main__.py
index c904941..6c62422 100755
--- a/spcd/__main__.py
+++ b/spcd/__main__.py
@@ -2,8 +2,8 @@
 
 """Entry point."""
 
-import os
 import sys
+from os import environ, pathsep
 
 import env
 
@@ -12,7 +12,7 @@ if env.SPCD_PYTHON_VENV_PACKAGES not in sys.path:
 import spcd
 
 if __name__ == "__main__":
-    os.environ["PATH"] = os.pathsep.join(
-        [env.SPCD_PYTHON_VENV_BINARIES, os.environ["PATH"]]
-    )
+    paths = environ["PATH"].split(pathsep)
+    if env.SPCD_PYTHON_VENV_BINARIES not in paths:
+        environ["PATH"] = pathsep.join([env.SPCD_PYTHON_VENV_BINARIES, *paths])
     spcd.main(__file__)