diff --git a/home.nix b/home.nix
index ed32a75..b699473 100644
--- a/home.nix
+++ b/home.nix
@@ -170,6 +170,7 @@
 
   home.sessionVariables = {
     _ZO_FZF_OPTS = "--preview 'eza --tree --level=2 --color=always {2..}' --preview-window=right:40%";
+    NIX_BUILD_SHELL = "zsh";
   };
 
   # ── Git ─────────────────────────────────────────────────────────────────────