diff --git a/script/cargo b/script/cargo
index 0eb8e927d71c8a404b7ec723d7e7bbae8f482fed..8226a2becdbbcc27e5ad01b27f8479fea706fa5d 100755
--- a/script/cargo
+++ b/script/cargo
@@ -53,7 +53,7 @@ function getShellConfigPath(shell) {
   const home = os.homedir();
   switch (shell) {
     case "zsh":
-      return path.join(home, ".zshrc");
+      return path.join(process.env.ZDOTDIR || home, ".zshrc");
     case "bash":
       // Prefer .bashrc, fall back to .bash_profile
       const bashrc = path.join(home, ".bashrc");