diff --git a/ci-image/Dockerfile b/ci-image/Dockerfile
index 974526f..8c2a759 100644
--- a/ci-image/Dockerfile
+++ b/ci-image/Dockerfile
@@ -2,6 +2,8 @@ ARG NIX_TAG="latest"
 
 FROM nixos/nix:$NIX_TAG
 
+RUN nix profile install nixpkgs#bashInteractive
+
 COPY entrypoint.sh /usr/local/bin/
 COPY nix.conf /etc/nix/nix.conf
 COPY nix.conf /root/.config/nix/nix.conf