--- kernel/Makefile.in.orig	2011-10-13 23:36:54.000000000 +0200
+++ kernel/Makefile.in	2011-10-13 23:37:46.000000000 +0200
@@ -267,7 +267,7 @@
 	-rm -f p_Procs_Dynamic p_Procs_Dynamic.exe
 
 p_Procs_%.so: p_Procs_Lib_%.dl_o
-	$(LD) ${SLDFLAGS} -o $@ $^
+	$(LD) ${SLDFLAGS} -install_name @GENTOO_PORTAGE_EPREFIX@/usr/lib/singular/$@ -o $@ $^
 
 ##
 ## install targets

--- Singular/Makefile.in.orig	2011-10-14 23:59:07.000000000 +0200
+++ Singular/Makefile.in	2011-10-14 23:58:34.000000000 +0200
@@ -492,7 +492,7 @@
 	$(LD) ${SLDFLAGS} -o $@ $^ -L${libdir} ${MP_LIBS} ${GLIBC_DYN_FIX}
 
 dbmsr.so: $(DBMSR_SOURCES:.cc=.dl_o)
-	$(LD) ${SLDFLAGS} -o $@ $^ ${GLIBC_DYN_FIX}
+	$(LD) ${SLDFLAGS} -install_name @GENTOO_PORTAGE_EPREFIX@/usr/lib/singular/$@ -o $@ $^ ${GLIBC_DYN_FIX}
 
 # dynamic module for python bject support
 pyobject.${MODULE_SUFFIX}: pyobject.dl_o