+
+# Get rid of --enable-hc-boot-unregisterised in $configotps if we had it
+configopts=`echo $configopts | sed s/--enable-hc-boot-unregisterised//`
+
+# Reconfigure, using the newly-build ghc binary as our $(GHC), and
+# with hc bootstrapping disabled.
+HappyCmd="$PWD/distrib/fake-happy" ./configure --with-ghc="$PWD/compiler/ghc-inplace" $configopts
+
+PRIMOP_BITS="primop-data-decl.hs-incl \
+ primop-tag.hs-incl \
+ primop-list.hs-incl \
+ primop-has-side-effects.hs-incl \
+ primop-out-of-line.hs-incl \
+ primop-commutable.hs-incl \
+ primop-needs-wrapper.hs-incl \
+ primop-can-fail.hs-incl \
+ primop-strictness.hs-incl \
+ primop-usage.hs-incl \
+ primop-primop-info.hs-incl"
+
+# Remove the old libraries. Don't use make clean, because we don't
+# want to delete the .hs files generated from the .hsc files, because
+# we don't have hsc2hs built yet.
+find libraries hslibs | grep '\.[oa]$' | xargs rm -f
+
+# Do includes and RTS now
+$MAKE -C includes boot && $MAKE -C includes all
+$MAKE -C rts boot && $MAKE -C rts all
+
+# Now build a new set of libraries (GhcBootLibs only for now)
+$MAKE -C libraries boot all GhcBootLibs=YES
+
+# Build all of compat
+$MAKE -C compat clean && $MAKE -C compat boot all
+
+# Build all of utils
+$MAKE -C utils clean && $MAKE -C utils boot all
+
+# Build the rest of the libraries
+$MAKE -C libraries boot all
+
+# The reconfigure step updates a few files, which can lead to
+# unnecessary recompilations. Touch a bunch of things here to avoid
+# having to recompile stuff that we've already built.
+(cd compiler; touch main/Config.hs $PRIMOP_BITS stage1/*/*.o stage1/ghc-* ghc-*)
+
+echo hc-build done
+echo The tree should be safe to do 'make install stage=1' in.
+