diff --git a/mesa.spec b/mesa.spec
index 00784f5..a75d05b 100644
--- a/mesa.spec
+++ b/mesa.spec
@@ -370,11 +370,13 @@ Headers for development with the Vulkan API.
 %endif
 
 %prep
-%autosetup -n %{name}-%{version}%{?rctag:-%{rctag}} -p1
 %if 0%{sanitize}
+%setup -q -n %{name}-%{version}%{?rctag:-%{rctag}}
   cp -f %{SOURCE1} src/gallium/auxiliary/vl/vl_decoder.c
   cp -f %{SOURCE2} src/gallium/auxiliary/vl/vl_mpeg12_decoder.c
+  exit
 %else
+%autosetup -n %{name}-%{version}%{?rctag:-%{rctag}} -p1
   cmp %{SOURCE1} src/gallium/auxiliary/vl/vl_decoder.c
   cmp %{SOURCE2} src/gallium/auxiliary/vl/vl_mpeg12_decoder.c
 %endif
diff --git a/sources b/sources
index c54f042..36690f8 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (mesa-18.0.5.tar.xz) = 04a9f0abd4936ba09770236cfb1e196cb09c69064e7c61bb29c83f20df223d463d0328b914eeaa426bb0958313901cae54d08e58dc61c75c5ab96f5d858c1a87
+SHA512 (mesa-18.0.5.tar.xz) = 3c184d5b35908aefcefd046f7472916545041d6caf72ca83187908aaeba91d0df2e2ca3321b83458008300fc33ae27fc0829cf3d800d39daedb4164b0f3d9b3e