diff --git a/build/root/install.sh b/build/root/install.sh
index e5078e7..20235c2 100644
--- a/build/root/install.sh
+++ b/build/root/install.sh
@@ -3,6 +3,9 @@
 # exit script if return code != 0
 set -e
 
+# release tag name from build arg, stripped of build ver using string manipulation
+release_tag_name="${1//-[0-9][0-9]/}"
+
 # note do NOT download build scripts - inherited from int script with envvars common defined
 
 # detect image arch
@@ -50,9 +53,9 @@ source aur.sh
 # custom
 ####
 
-# this is a (temporary?) hack to prevent the error '/usr/bin/qbittorrent-nox: 
-# error while loading shared libraries: libQt5Core.so.5: cannot open shared 
-# object file: No such file or directory.' when running this container on 
+# this is a (temporary?) hack to prevent the error '/usr/bin/qbittorrent-nox:
+# error while loading shared libraries: libQt5Core.so.5: cannot open shared
+# object file: No such file or directory.' when running this container on
 # hosts with older kernels (centos, mac os). alternative workaround to this
 # is for the user to upgrade the kernel on their host.
 pacman -S binutils --needed --noconfirm
@@ -61,7 +64,7 @@ strip --remove-section=.note.ABI-tag /usr/lib64/libQt5Core.so.5
 # container perms
 ####
 
-# define comma separated list of paths 
+# define comma separated list of paths
 install_paths="/etc/privoxy,/home/nobody"
 
 # split comma separated string into list for install paths
@@ -91,7 +94,7 @@ cat <<EOF > /tmp/permissions_heredoc
 previous_puid=\$(cat "/root/puid" 2>/dev/null || true)
 previous_pgid=\$(cat "/root/pgid" 2>/dev/null || true)
 
-# if first run (no puid or pgid files in /tmp) or the PUID or PGID env vars are different 
+# if first run (no puid or pgid files in /tmp) or the PUID or PGID env vars are different
 # from the previous run then re-apply chown with current PUID and PGID values.
 if [[ ! -f "/root/puid" || ! -f "/root/pgid" || "\${previous_puid}" != "\${PUID}" || "\${previous_pgid}" != "\${PGID}" ]]; then