diff -Nru core-multilib/libgmp/Pkgfile core-x86_64/libgmp/Pkgfile
--- core-multilib/libgmp/Pkgfile	2012-01-04 16:43:17.613018376 +0000
+++ core-x86_64/libgmp/Pkgfile	2012-01-04 16:43:23.445018619 +0000
@@ -11,7 +11,7 @@
     cd gmp-$version
     ./configure --prefix=/usr \
                        --enable-cxx \
-                       --build=x86_64-unknown-linux-gnu
+                       --build=x86_64-pc-linux-gnu
     make
     make DESTDIR=$PKG install
     rm -r $PKG/usr/share