diff --git a/ext/aspell/Makefile.in b/ext/aspell/Makefile.in
index 1c5ad518228..94ffb01cf58 100644
--- a/ext/aspell/Makefile.in
+++ b/ext/aspell/Makefile.in
@@ -1,10 +1,5 @@
 
-DEPTH     = ../..
-topsrcdir = @topsrcdir@
-srcdir    = @srcdir@
-VPATH     = @srcdir@
-
 LTLIBRARY_NAME    = libaspell.la
 LTLIBRARY_SOURCES = aspell.c
 
-include $(topsrcdir)/build/ltlib.mk
+include $(top_srcdir)/build/ltlib.mk
diff --git a/ext/bcmath/Makefile.in b/ext/bcmath/Makefile.in
index 63953d35e08..e8517a459c1 100644
--- a/ext/bcmath/Makefile.in
+++ b/ext/bcmath/Makefile.in
@@ -1,11 +1,6 @@
 
-DEPTH     = ../..
-topsrcdir = @topsrcdir@
-srcdir    = @srcdir@
-VPATH     = @srcdir@
-
 LTLIBRARY_NAME    = libbcmath.la
 LTLIBRARY_SOURCES = bcmath.c number.c
 
-include $(topsrcdir)/build/ltlib.mk
+include $(top_srcdir)/build/ltlib.mk
 
diff --git a/ext/calendar/Makefile.in b/ext/calendar/Makefile.in
index 9ffcafdc380..1b49f58b8f7 100644
--- a/ext/calendar/Makefile.in
+++ b/ext/calendar/Makefile.in
@@ -1,11 +1,5 @@
-# $Id$
-
-DEPTH     = ../..
-topsrcdir = @topsrcdir@
-srcdir    = @srcdir@
-VPATH     = @srcdir@
 
 LTLIBRARY_NAME    = libcalendar.la
 LTLIBRARY_SOURCES = calendar.c dow.c french.c gregor.c jewish.c julian.c easter.c cal_unix.c
 
-include $(topsrcdir)/build/ltlib.mk
+include $(top_srcdir)/build/ltlib.mk
diff --git a/ext/cpdf/Makefile.in b/ext/cpdf/Makefile.in
index 11961fe66ef..ee8e1cd1cb2 100644
--- a/ext/cpdf/Makefile.in
+++ b/ext/cpdf/Makefile.in
@@ -1,10 +1,5 @@
 
-DEPTH     = ../..
-topsrcdir = @topsrcdir@
-srcdir    = @srcdir@
-VPATH     = @srcdir@
-
 LTLIBRARY_NAME    = libcpdf.la
 LTLIBRARY_SOURCES = cpdf.c
 
-include $(topsrcdir)/build/ltlib.mk
+include $(top_srcdir)/build/ltlib.mk
diff --git a/ext/cybercash/Makefile.in b/ext/cybercash/Makefile.in
index fc24880d42f..3d3c1d39e71 100644
--- a/ext/cybercash/Makefile.in
+++ b/ext/cybercash/Makefile.in
@@ -1,10 +1,5 @@
 
-DEPTH     = ../..
-topsrcdir = @topsrcdir@
-srcdir    = @srcdir@
-VPATH     = @srcdir@
-
 LTLIBRARY_NAME    = libcybercash.la
 LTLIBRARY_SOURCES = cybercash.c
 
-include $(topsrcdir)/build/ltlib.mk
+include $(top_srcdir)/build/ltlib.mk
diff --git a/ext/dav/Makefile.in b/ext/dav/Makefile.in
index c3522068b49..5e3149ea236 100644
--- a/ext/dav/Makefile.in
+++ b/ext/dav/Makefile.in
@@ -1,10 +1,5 @@
 
-DEPTH     = ../..
-topsrcdir = @topsrcdir@
-srcdir    = @srcdir@
-VPATH     = @srcdir@
-
 LTLIBRARY_NAME    = libdav.la
 LTLIBRARY_SOURCES = dav.c
 
-include $(topsrcdir)/build/ltlib.mk
+include $(top_srcdir)/build/ltlib.mk