diff --git a/spcd/bootstrap.sh b/spcd/bootstrap.sh
index b84b585..acde953 100644
--- a/spcd/bootstrap.sh
+++ b/spcd/bootstrap.sh
@@ -405,11 +405,6 @@ SPCD_OS_OPENSUSE="opensuse"
 SPCD_OS_ROCKY="rocky"
 SPCD_OS_UBUNTU="ubuntu"
 
-SPCD_PF_APK="apk"
-SPCD_PF_DEB="deb"
-SPCD_PF_PKG="pkg"
-SPCD_PF_RPM="rpm"
-
 SPCD_PM_APK="apk"
 SPCD_PM_APT="apt"
 SPCD_PM_DNF="dnf"
@@ -619,25 +614,9 @@ ${SPCD_PROJECT_ROOT}$(basename "${GITHUB_SERVER_URL}")"
         ;;
     *) ;;
     esac
-    # set package format
-    case "${SPCD_PM}" in
-    "${SPCD_PM_APK}")
-        SPCD_PF="${SPCD_PF_APK}"
-        ;;
-    "${SPCD_PM_APT}")
-        SPCD_PF="${SPCD_PF_DEB}"
-        ;;
-    "${SPCD_PM_PACMAN}")
-        SPCD_PF="${SPCD_PF_PKG}"
-        ;;
-    "${SPCD_PM_DNF}" | "${SPCD_PM_ZYPPER}")
-        SPCD_PF="${SPCD_PF_RPM}"
-        ;;
-    *) ;;
-    esac
     # set package manager variables
     spcd_split
-    spcd_os_printenv "SPCD_PF" "SPCD_PM"
+    spcd_os_printenv "SPCD_PM"
     case "${SPCD_PM}" in
     "${SPCD_PM_DNF}")
         SPCD_PM_INSTALL="dnf install --assumeyes"
@@ -1196,8 +1175,8 @@ spcd_install_packages() {
     spcd_install_package "rsync"
     # shell check
     spcd_step "ShellCheck"
-    case "${SPCD_PF}" in
-    "${SPCD_PF_RPM}")
+    case "${SPCD_PM}" in
+    "${SPCD_PM_DNF}" | "${SPCD_PM_ZYPPER}")
         spcd_install_package "ShellCheck"
         ;;
     *) spcd_install_package "shellcheck" ;;