diff --git a/nix/validate.nix b/nix/validate.nix
index 4159f80..579a7af 100644
--- a/nix/validate.nix
+++ b/nix/validate.nix
@@ -10,7 +10,9 @@ writeShellApplication {
 	];
 	text = ''
 		shopt -s globstar
+		export PACKER_LOG=1
 		packer init sources
+		unset PACKER_LOG
 		for vars in distros/**/*.pkrvars.hcl; do
 			packer validate -except=upload "-var-file=''${vars}" sources/
 		done