diff --git a/cd/__init__.py b/cd/__init__.py
index a23ea49..e85220a 100644
--- a/cd/__init__.py
+++ b/cd/__init__.py
@@ -83,7 +83,7 @@ def cat(file: str) -> None:
     shut(file)
 
 
-def install_commands(path) -> None:
+def install_commands(path: str) -> None:
     step("Install commands")
     user = Path("/usr/local/bin")
     for command in [
@@ -94,7 +94,7 @@ def install_commands(path) -> None:
         "synchronize",
     ]:
         print(command)
-        os.symlink(path, user / f"{COMMANDS_PREFIX}{command}")
+        (user / f"{COMMANDS_PREFIX}{command}").symlink_to(path)
 
 
 def set_ssh(*arguments) -> None:
diff --git a/cd/__main__.py b/cd/__main__.py
index 891e6aa..774fbe5 100755
--- a/cd/__main__.py
+++ b/cd/__main__.py
@@ -6,12 +6,11 @@ from pathlib import Path
 import cd
 
 if __name__ == "__main__":
-    command, *arguments = sys.argv
-    command = Path(command).name
-    if command == "__main__.py":
+    path, *arguments = sys.argv
+    name = Path(path).name
+    if name == "__main__.py":
         cd.set_ssh(*arguments)
         cd.install_commands(__file__)
     else:
-        command = command.replace("-", "_")
-        function = getattr(cd, command)
+        function = getattr(cd, name.replace("-", "_"))
         function(*arguments)