--- vamps-0.99.2.old/play_cell/Makefile
+++ vamps-0.99.2/play_cell/Makefile
@@ -14,7 +14,7 @@
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
 
-PREFIX    ?= /usr/local
+PREFIX    ?= __META_PKGDIR_PROD__
 
 CC         = gcc
 CFLAGS    ?= -pipe -O2 -fomit-frame-pointer
--- vamps-0.99.2.old/vamps/Makefile
+++ vamps-0.99.2/vamps/Makefile
@@ -15,7 +15,7 @@
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
 
-PREFIX    ?= /usr/local
+PREFIX    ?= __META_PKGDIR_PROD__
 
 CC         = gcc
 CFLAGS    ?= -pipe -O3 -fomit-frame-pointer -funroll-loops \