diff --git a/ci-image/entrypoint.sh b/ci-image/entrypoint.sh
index 27c6ec9..58f6b93 100755
--- a/ci-image/entrypoint.sh
+++ b/ci-image/entrypoint.sh
@@ -5,5 +5,6 @@ cd "$CI_PROJECT_DIR"
 
 nix_shell="${NIX_CI_SHELL:-ci}"
 
+echo "Using nix version $(nix --version)"
 echo "Activating flake's '$nix_shell' shell..."
 nix develop .#"$nix_shell" --impure --command "bash"