The reason this gets hit is because of the debugger in flakes. Otherwise you never have a repl in pure mode anyway. We evaluate the repl-overlay file in impure mode but this doesn't do what one would initially expect. Fixes: https://git.lix.systems/lix-project/lix/issues/777 Change-Id: I19b8ed2f5e9ce500b633b13301b42df69ab7deb3