replace expect with bash.

pkgs/distro-packages/flake-module.nix

@@ -13,12 +13,13 @@
           pkgs.runCommand "deb-gui-install-test" { } ''
             ${pkgs.dpkg}/bin/dpkg -i ${self'.checks.package-gui-installer-deb}/*.deb
             ls -la /usr/bin/clan-app
-            ${pkgs.expect}/bin/expect -c '
-              spawn /usr/bin/clan-app
-              expect "Clan requires Nix to be installed. Would you like to install it now? (y/n)"
-              send "n"
-              expect "Clan cannot run without Nix. Exiting."
-            '
+            while IFS= read -r line; do
+              if [[ "$line" == "Clan requires Nix to be installed. Would you like to install it now? (y/n)" ]]; then
+                echo "n"
+              elif [[ "$line" == "Clan cannot run without Nix. Exiting." ]]; then
+                break
+              fi
+            done < <(/usr/bin/clan-app)
             touch $out
           ''
         );