diff --git a/dev-lang/perl/perl-5.10.1.recipe b/dev-lang/perl/perl-5.10.1.recipe
index 6896166aa..a1eb8bb6c 100644
--- a/dev-lang/perl/perl-5.10.1.recipe
+++ b/dev-lang/perl/perl-5.10.1.recipe
@@ -16,6 +16,7 @@ BUILD_PREREQUIRES="haiku-devel >= $haikuVersion
 CHECKSUM_MD5="b9b2fdb957f50ada62d73f43ee75d044"
 
 SOURCE_DIR="$portVersionedName"
+BUILD_PACKAGE_ACTIVATION_PHASE="INSTALL"
 
 BUILD()
 {
diff --git a/sys-devel/autoconf/autoconf-2.68.recipe b/sys-devel/autoconf/autoconf-2.68.recipe
index 32f17f3c3..7ea79bb71 100644
--- a/sys-devel/autoconf/autoconf-2.68.recipe
+++ b/sys-devel/autoconf/autoconf-2.68.recipe
@@ -31,6 +31,7 @@ BUILD_PREREQUIRES="haiku-devel >= $haikuVersion
 	cmd:sed"
 
 SOURCE_DIR="$portVersionedName"
+BUILD_PACKAGE_ACTIVATION_PHASE="INSTALL"
 
 BUILD()
 {