diff --git a/srcpkgs/tar/template b/srcpkgs/tar/template
index 0a49caa7e91..2ec183c02f1 100644
--- a/srcpkgs/tar/template
+++ b/srcpkgs/tar/template
@@ -13,6 +13,8 @@ distfiles="${GNU_SITE}/tar/${pkgname}-${version}.tar.xz"
 checksum=d0d3ae07f103323be809bc3eac0dcc386d52c5262499fe05511ac4788af1fdd8
 
 pre_configure() {
+	# chroot-style=ethereal
+	export FORCE_UNSAFE_CONFIGURE=1
 	# avoid regenerating doc on install
 	touch -r doc/stamp-vti configure
 }