diff --git a/devenv.nix b/devenv.nix
index 953bc33..1d24821 100644
--- a/devenv.nix
+++ b/devenv.nix
@@ -13,12 +13,12 @@
 
   # https://devenv.sh/scripts/
   scripts.welcome-banner.exec = ''
-    echo "Welcome to the $NAME development environment."
+    echo "Welcome to the $$NAME development environment."
     echo "Bazel version: $(bazel --version | cut -d ' ' -f 2)"
   '';
 
   scripts.build.exec = ''
-    bazel build //main:$NAME
+    bazel build //main:$$NAME
   '';
 
   scripts.clean.exec = ''