--- libcxxabi-11.0.0.mainline.ebuild	2020-11-30 16:18:52.000000000 -0600
+++ libcxxabi-11.0.0.mainline.ebuild	2020-12-09 19:01:32.000000000 -0600
@@ -16,8 +16,8 @@ 
 
 LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
 SLOT="0"
-KEYWORDS="amd64 arm arm64 x86"
-IUSE="+libunwind +static-libs test elibc_musl"
+KEYWORDS="amd64 arm arm64 x86 ~x64-macos"
+IUSE="+libunwind +static-libs test elibc_musl bootstrap"
 RESTRICT="!test? ( test )"
 
 RDEPEND="
@@ -39,7 +39,7 @@ 
 }
 
 pkg_setup() {
-	llvm_pkg_setup
+	use bootstrap || llvm_pkg_setup
 	use test && python-any-r1_pkg_setup
 }