This repo is "Add_dependency" free now.

srcpkgs/kernel-libc-headers/template

@@ -6,19 +6,17 @@ wrksrc=linux-${version}
 homepage="http://www.kernel.org"
 distfiles="http://www.kernel.org/pub/linux/kernel/v3.x/linux-${version}.tar.xz"
 checksum=9db97d45638017e6dfaed768cfa9f47533c9c9fb3538bce0e594d9feff5489b4
+bootstrap=yes
+nostrip=yes
+noverifyrdeps=yes
+if [ -n "$IN_CHROOT" ]; then
+	makedepends="perl"
+fi
 short_desc="The Linux kernel headers for development"
 license="GPL-2"
 long_desc="
  This package provides the linux kernel headers for use in userspace."
 
-bootstrap=yes
-nostrip=yes
-noverifyrdeps=yes
-
-if [ -n "$IN_CHROOT" ]; then
-	Add_dependency build perl ">=0"
-fi
-
 do_build() {
 	make mrproper
 	make headers_check