diff --git a/.conduit.yaml b/.conduit.yaml
index 5655b83..db0ff6e 100644
--- a/.conduit.yaml
+++ b/.conduit.yaml
@@ -7,8 +7,8 @@
 - brew:
     - zsh
 - command:
-    - install: sudo chsh -s `which zsh` $USER
-      remove: sudo chsh -s `which bash` $USER
+    - install: 'finger $USER | grep zsh || sudo chsh -s `which zsh` $USER'
+      remove: 'finger $USER | grep zsh && sudo chsh -s `which bash` $USER'
 - symlink:
     - {src: zlogin, dst: ~/.zlogin}
     - {src: zlogout, dst: ~/.zlogout}