--- thunderbird-60.6.1/build/moz.configure/rust.configure	2019-03-25 02:38:14.000000000 +0100
+++ thunderbird-60.6.1/build/moz.configure/rust.configure.new	2019-04-12 15:54:48.741710839 +0200
@@ -190,9 +190,11 @@ def rust_triple_alias(host_or_target):
             die("Don't know how to translate {} for rustc".format(
                 host_or_target.alias))
 
+        rustc_target_alias = 'armv7-unknown-linux-gnueabihf'
+
         # Check to see whether our rustc has a reasonably functional stdlib
         # for our chosen target.
-        target_arg = '--target=' + rustc_target.alias
+        target_arg = '--target=' + rustc_target_alias
         in_fd, in_path = mkstemp(prefix='conftest', suffix='.rs')
         out_fd, out_path = mkstemp(prefix='conftest', suffix='.rlib')
         os.close(out_fd)
@@ -220,7 +222,7 @@ def rust_triple_alias(host_or_target):
                 a rust std library for that target installed. Try:
 
                   rustup target add {}
-                '''.format(host_or_target.alias, rustc, rustc_target.alias)))
+                '''.format(rustc_target_alias, rustc, rustc_target_alias)))
             check_cmd_output(*cmd, onerror=failed)
             if not os.path.exists(out_path) or os.path.getsize(out_path) == 0:
                 failed()
@@ -229,7 +231,7 @@ def rust_triple_alias(host_or_target):
             os.remove(out_path)
 
         # This target is usable.
-        return rustc_target.alias
+        return rustc_target_alias
 
     return rust_target