force perl modules reinstallation after rebuilding

auto/lib/perl/make

diff --git a/auto/lib/perl/make b/auto/lib/perl/make
index 73ad120..513f971 100644
--- a/auto/lib/perl/make
+++ b/auto/lib/perl/make
@@ -14,6 +14,8 @@
 
 	cd $NGX_OBJS/src/http/modules/perl && make
 
+	rm -rf $NGX_OBJS/install_perl
+
 
 $NGX_OBJS/src/http/modules/perl/Makefile:				\
 		src/http/modules/perl/Makefile.PL			\
@@ -30,5 +32,4 @@
 		$NGX_PERL Makefile.PL					\
 			LIB=$NGX_PERL_MODULES
 
-
 END