diff --git a/zlibs/iso b/zlibs/iso
index b43a521..69ae0f1 100644
--- a/zlibs/iso
+++ b/zlibs/iso
@@ -103,11 +103,9 @@ iso_squash_strap() {
 
 	notice "creating squashfs out of strapdir"
 
-	[[ -n "$mkefi" ]] && uefi_opt="-Xbcj x86"
 	pushd $workdir
 	sudo mksquashfs $strapdir binary/live/filesystem.squashfs \
-		${=uefi_opt} \
-		-noappend -comp xz || zerr
+		-Xbcj x86 -noappend -comp xz || zerr
 	popd
 	unset uefi_opt
 }
@@ -149,7 +147,6 @@ iso_xorriso_build() {
 		-o $R/dist/$isoname \
 		binary || zerr
 	popd
-	unset uefi_opt
 }
 
 iso_setup_installer() {