Handle negated check returning false when file is present

main/nnd-s6-services/APKBUILD

@@ -3,7 +3,7 @@
 . ../../APKBUILD.template
 
 pkgname=nnd-s6-services
-pkgver=2.51
+pkgver=2.52
 pkgrel=0
 pkgdesc="Base services for s6"
 depends="s6-rc s6-portable-utils s6-linux-utils"

main/nnd-s6-services/rc/machineid/up

@@ -2,7 +2,7 @@
 s6-envdir -i /etc/s6/env/path
 emptyenv -p
 
-if -n { [ -r /etc/machine-id ] }
+ifelse -Xn { [ -r /etc/machine-id ] } {
 	redirfd -w 1 /etc/machine-id
 		foreground {
 			pipeline {
@@ -12,3 +12,4 @@ if -n { [ -r /etc/machine-id ] }
 			} head -c 32
 		}
 		printf "\n"
+} true