diff --git a/packages/compiler/gcc/gcc-4.7.2 b/packages/compiler/gcc/gcc-4.7.2
index cbf76f5..e133821 100755
--- a/packages/compiler/gcc/gcc-4.7.2
+++ b/packages/compiler/gcc/gcc-4.7.2
@@ -14,6 +14,22 @@ INSTALLER="Christoph Niethammer <niethammer@hlrs.de>"
 A=gcc-${VERSION}.tar.bz2
 P=gcc-${VERSION}
 
+src_unpack() {
+	# extract gcc source package
+	unpack
+	if [ $PLATFORM = "laki" ] ; then 
+		# On laki currently too old versions of GMP, MPFR and MPC are installed
+		# http://gcc.gnu.org/install/prerequisites.html
+		# unpack required GMP, MPFR and MPC sources into subdirectories
+		tar xjf ${SRC_POOL}/gmp-4.3.2.tar.bz2  -C $SRCDIR 
+		tar xjf ${SRC_POOL}/mpfr-2.4.2.tar.bz2 -C $SRCDIR 
+		tar xzf ${SRC_POOL}/mpc-0.8.1.tar.gz   -C $SRCDIR 
+		# rename subdirectories as required by gcc's configure
+		mv $SRCDIR/gmp-*  $SRCDIR/gmp
+		mv $SRCDIR/mpfr-* $SRCDIR/mpfr
+		mv $SRCDIR/mpc-*  $SRCDIR/mpc
+	fi
+} 
 
 # Other interesting configure options:
 CONFIGURE_OPTS=" \