diff --git a/shell.nix b/shell.nix
index e8f1a3b..17c5989 100644
--- a/shell.nix
+++ b/shell.nix
@@ -9,6 +9,8 @@
   ];
 
   shellHook = ''
-    source init.sh
+    if [ -f init.sh ]; then
+      source init.sh
+    fi
   '';
 }