diff --git a/rust.spec b/rust.spec
index 2c47ba9..b4dc7d2 100644
--- a/rust.spec
+++ b/rust.spec
@@ -133,19 +133,25 @@ invoking gdb on rust binaries.
 %prep
 %setup -q -n rustc-%{version}-src
 %patch1 -p1
+sed -e 's:<rust-triple>:%{rust_triple}:g' \
+	-e 's:<prefix>:%{_prefix}:g' \
+    -e 's:<libdir>:%{_prefix}/lib:g' \
+    -e 's:<mandir>:%{_mandir}:g' \
+    -e 's:<docdir>:%{_docdir}/%{name}:g' \
+    %{SOURCE1} > config.toml
 
 %build
 export CPPFLAGS="%{optflags}" # eliminate complain from RPMlint
+./x.py build -v
+./x.py doc -v
+
+%install
 sed -e 's:<rust-triple>:%{rust_triple}:g' \
 	-e 's:<prefix>:%{buildroot}%{_prefix}:g' \
     -e 's:<libdir>:%{buildroot}%{_prefix}/lib:g' \
     -e 's:<mandir>:%{buildroot}%{_mandir}:g' \
     -e 's:<docdir>:%{buildroot}%{_docdir}/%{name}:g' \
     %{SOURCE1} > config.toml
-./x.py build -v
-./x.py doc -v
-
-%install
 ./x.py dist --install
 # Fix any rpaths if needed
 chrpath -d %{buildroot}%{_prefix}/lib/lib*.so