--- w32api-3.7/lib/Makefile.in
+++ w32api-3.7/lib/Makefile.in
@@ -46,6 +46,8 @@
 inst_includedir:=$(includedir)
 inst_libdir:=$(libdir)
 endif
+inst_includedir:=$(DESTDIR)$(inst_includedir)
+inst_libdir:=$(DESTDIR)$(inst_libdir)
 
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
--- w32api-3.7/lib/directx/Makefile.in
+++ w32api-3.7/lib/directx/Makefile.in
@@ -42,6 +42,8 @@
 inst_includedir:=$(includedir)
 inst_libdir:=$(libdir)
 endif
+inst_includedir:=$(DESTDIR)$(inst_includedir)
+inst_libdir:=$(DESTDIR)$(inst_libdir)
 
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@
--- w32api-3.7/lib/ddk/Makefile.in
+++ w32api-3.7/lib/ddk/Makefile.in
@@ -42,6 +42,8 @@
 inst_includedir:=$(includedir)/ddk
 inst_libdir:=$(libdir)
 endif
+inst_includedir:=$(DESTDIR)$(inst_includedir)
+inst_libdir:=$(DESTDIR)$(inst_libdir)
 
 INSTALL = @INSTALL@
 INSTALL_DATA = @INSTALL_DATA@