diff --git a/firefox.spec b/firefox.spec
index d6d9fc5..e83b135 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -56,9 +56,9 @@ ExcludeArch: ppc64le ppc64 s390x
 
 %define build_with_rust   1
 
-%ifarch ppc64 ppc64le s390x
-%define build_with_rust   0
-%endif
+#%ifarch ppc64 ppc64le s390x
+#%define build_with_rust   0
+#%endif
 
 # Build as a debug package?
 %define debug_build       0
@@ -89,7 +89,6 @@ ExcludeArch: ppc64le ppc64 s390x
 %global mozappdir     %{_libdir}/%{name}
 %global mozappdirdev  %{_libdir}/%{name}-devel-%{version}
 %global langpackdir   %{mozappdir}/langpacks
-%global tarballdir    %{name}-%{version}
 
 %define official_branding       1
 %define build_langpacks         1
@@ -146,6 +145,7 @@ Patch225:        mozilla-1005640-accept-lang.patch
 Patch226:        rhbz-1354671.patch
 Patch227:        rhbz-1400293-fix-mozilla-1324096.patch
 Patch229:        firefox-nss-version.patch
+Patch230:        mozilla-rust-config.patch
 
 # Upstream patches
 Patch304:        mozilla-1253216.patch
@@ -292,8 +292,7 @@ This package contains results of tests executed during build.
 #---------------------------------------------------------------------
 
 %prep
-%setup -q -c
-cd %{tarballdir}
+%setup -q
 
 # Build patches, can't change backup suffix from default because during build
 # there is a compare of config and js/config directories and .orig suffix is
@@ -327,6 +326,7 @@ cd %{tarballdir}
 %endif
 %patch227 -p1 -b .rh1400293
 %patch229 -p1 -b .nss-version
+%patch230 -p1 -b .rust
 
 %patch304 -p1 -b .1253216
 %patch402 -p1 -b .1196777
@@ -584,7 +584,6 @@ rm -f  objdir/dist/bin/pk12util
 #---------------------------------------------------------------------
 
 %install
-cd %{tarballdir}
 
 # set up our default bookmarks
 %{__cp} -p %{default_bookmarks_file} objdir/dist/bin/browser/chrome/en-US/locale/browser/bookmarks.html
diff --git a/mozilla-rust-config.patch b/mozilla-rust-config.patch
new file mode 100644
index 0000000..b4d59af
--- /dev/null
+++ b/mozilla-rust-config.patch
@@ -0,0 +1,22 @@
+diff -up firefox-53.0.2/build/moz.configure/rust.configure.powerpc-rust firefox-53.0.2/build/moz.configure/rust.configure
+--- firefox-53.0.2/build/moz.configure/rust.configure.powerpc-rust	2017-05-25 13:07:00.041331688 +0200
++++ firefox-53.0.2/build/moz.configure/rust.configure	2017-05-25 13:59:49.692189995 +0200
+@@ -131,6 +131,9 @@ def rust_triple_alias(host_or_target):
+             ('sparc64', 'Linux'): 'sparc64-unknown-linux-gnu',
+             ('x86', 'Linux'): 'i686-unknown-linux-gnu',
+             ('x86_64', 'Linux'): 'x86_64-unknown-linux-gnu',
++            ('ppc64le', 'Linux'): 'powerpc64le-unknown-linux-gnu',
++            ('ppc64', 'Linux'): 'powerpc64-unknown-linux-gnu',
++            ('s390x', 'Linux'): 's390x-unknown-linux-gnu',
+             # OS X
+             ('x86', 'OSX'): 'i686-apple-darwin',
+             ('x86_64', 'OSX'): 'x86_64-apple-darwin',
+@@ -151,7 +154,7 @@ def rust_triple_alias(host_or_target):
+         }.get((host_or_target.cpu, os_or_kernel), None)
+ 
+         if rustc_target is None:
+-            die("Don't know how to translate {} for rustc".format(host_or_target.alias))
++            die("Don't know how to translate {} for rustc, cpu: {}, os: {}".format(target.alias, target.cpu, os_or_kernel))
+ 
+         # Check to see whether our rustc has a reasonably functional stdlib
+         # for our chosen target.