diff --git a/installer/disko-config.nix b/installer/disko-config.nix
index 7388018..eb183a0 100644
--- a/installer/disko-config.nix
+++ b/installer/disko-config.nix
@@ -19,6 +19,7 @@
 # function arguments are the right shape.
 { mainDrive
 , extraDrives ? []
+, ...
 }:
 
 let
diff --git a/installer/install.sh b/installer/install.sh
index bd54f0a..449472a 100755
--- a/installer/install.sh
+++ b/installer/install.sh
@@ -841,7 +841,7 @@ confirm_form_factor() {
     if [[ $rc -eq 0 ]]; then
         FORM_FACTOR="$default"
     else
-        if [[ $rc -eq 130 || $rc -eq 1 ]]; then return 130; fi
+        if [[ $rc -eq 130 ]]; then return 130; fi
         FORM_FACTOR=$([[ "$default" == "laptop" ]] && echo desktop || echo laptop)
     fi
     success "Form factor: $FORM_FACTOR"
@@ -875,7 +875,8 @@ configure_impermanence() {
         ENABLE_IMPERMANENCE="true"
         success "Impermanence enabled"
     else
-        if [[ $rc -eq 130 || $rc -eq 1 ]]; then return 130; fi
+        if [[ $rc -eq 130 ]]; then return 130; fi
+        ENABLE_IMPERMANENCE="false"
         info "Impermanence disabled (traditional persistent root)"
     fi
     save_state
@@ -1093,7 +1094,7 @@ run_disko_with_retry() {
     while true; do
         local rc=0
         set +e
-        disko --mode disko \
+        disko --mode destroy,format,mount \
               --argstr mainDrive "$main_drive" \
               --arg    extraDrives "$extras_nix" \
               "$disko_file" 2>&1 | tee "$log"