-expected_env_command_RE='^nix-env --profile /nix/var/nix/profiles/per-user/[^/]+/channels --show-trace --file '\''<nix/unpack-channel.nix>'\'' --install --from-expression '\''f: f \{ name = "link"; channelName = "bar"; src = builtins.storePath "'"$NIX_STORE_DIR"'/.{32}-link.tar.gz"; \}'\'' '\''f: f \{ name = "(repo-[0-9]{10}-[0-9a-f]{11})"; channelName = "foo"; src = builtins.storePath "'"$NIX_STORE_DIR"'/.{32}-\1.tar.xz"; \}'\''$'
+expected_env_command_RE='^nix-env --profile /nix/var/nix/profiles/per-user/[^/]+/channels --show-trace --file '\''<nix/unpack-channel.nix>'\'' --install --remove-all -I pinch_profile=/nix/var/nix/profiles/per-user/[^/]+/channels -I pinch_profile_manifest=/nix/store/.{32}-env-manifest.nix -I pinch_tarball_for_link=('"$NIX_STORE_DIR"'/.{32}-link.tar.gz) -I pinch_tarball_for_(repo-[0-9]{10}-[0-9a-f]{11})=('"$NIX_STORE_DIR"'/.{32}-\2.tar.xz) --from-expression '\''f: f \{ name = "link"; channelName = "bar"; src = builtins.storePath "\1"; \}'\'' '\''f: f \{ name = "\2"; channelName = "foo"; src = builtins.storePath "\3"; \}'\''$'