diff --git a/ci-image/Dockerfile b/ci-image/Dockerfile
index 8c2a759..12e9b43 100644
--- a/ci-image/Dockerfile
+++ b/ci-image/Dockerfile
@@ -2,7 +2,7 @@ ARG NIX_TAG="latest"
 
 FROM nixos/nix:$NIX_TAG
 
-RUN nix profile install nixpkgs#bashInteractive
+RUN nix-env -iA nixpkgs.bashInteractive
 
 COPY entrypoint.sh /usr/local/bin/
 COPY nix.conf /etc/nix/nix.conf