--- firefox-78.2.0/build/moz.configure/rust.configure.orig	2020-08-17 20:33:34.000000000 +0200
+++ firefox-78.2.0/build/moz.configure/rust.configure	2020-10-07 18:29:15.458050574 +0200
@@ -406,16 +406,6 @@
 rust_host_triple = rust_triple_alias(host, host_c_compiler)
 
 
-@depends(host, rust_host_triple, rustc_info.host)
-def validate_rust_host_triple(host, rust_host, rustc_host):
-    if rust_host != rustc_host:
-        if host.alias == rust_host:
-            configure_host = host.alias
-        else:
-            configure_host = '{}/{}'.format(host.alias, rust_host)
-        die("The rust compiler host ({}) is not suitable for the configure host ({})."
-            .format(rustc_host, configure_host))
-
 
 set_config('RUST_TARGET', rust_target_triple)
 set_config('RUST_HOST_TARGET', rust_host_triple)