--- firefox-78.8.0/build/moz.configure/rust.configure.orig	2021-03-25 15:32:02.149832908 +0100
+++ firefox-78.8.0/build/moz.configure/rust.configure	2021-03-25 15:32:18.845551888 +0100
@@ -313,6 +313,7 @@
                     suffix = 'hf'
                 else:
                     suffix = ''
+                prefixes = ['arm']
                 for p in prefixes:
                     for c in candidates:
                         if c.rust_target.startswith('{}-'.format(p)) and \