diff --git a/src/interfaces/ecpg/test/Makefile.regress b/src/interfaces/ecpg/test/Makefile.regress
index b3d7c1e..5df1a44 100644
--- a/src/interfaces/ecpg/test/Makefile.regress
+++ b/src/interfaces/ecpg/test/Makefile.regress
@@ -5,14 +5,14 @@ override CPPFLAGS := -I../../include -I$(top_srcdir)/src/interfaces/ecpg/include
        -I$(libpq_srcdir) $(CPPFLAGS)
 override CFLAGS += $(PTHREAD_CFLAGS)
 
-override LDFLAGS := -L../../ecpglib -L../../pgtypeslib $(filter-out -l%, $(libpq)) $(LDFLAGS)
+override LDFLAGS := -L'$(DESTDIR)$(libdir)/' $(filter-out -l%, $(libpq)) $(LDFLAGS)
 override LIBS := -lecpg -lpgtypes $(filter -l%, $(libpq)) $(LIBS) $(PTHREAD_LIBS)
 
 # Standard way to invoke the ecpg preprocessor
-ECPG = ../../preproc/ecpg --regression -I$(srcdir)/../../include -I$(srcdir)
+ECPG = '$(DESTDIR)$(bindir)/ecpg' --regression -I$(srcdir)/../../include -I$(srcdir)
 
 # Files that most or all ecpg preprocessor test outputs depend on
-ECPG_TEST_DEPENDENCIES = ../../preproc/ecpg$(X) \
+ECPG_TEST_DEPENDENCIES =  \
        $(srcdir)/../regression.h \
        $(srcdir)/../../include/sqlca.h \
        $(srcdir)/../../include/sqlda.h \