diff --git a/dev-libs/flatbuffers/flatbuffers-2.0.6.ebuild b/dev-libs/flatbuffers/flatbuffers-2.0.6.ebuild
index 6750da4524227..b54110232d5fc 100644
--- a/dev-libs/flatbuffers/flatbuffers-2.0.6.ebuild
+++ b/dev-libs/flatbuffers/flatbuffers-2.0.6.ebuild
@@ -16,7 +16,8 @@ SLOT="0/2"
 KEYWORDS="~amd64 ~arm ~arm64 ~x86"
 IUSE="static-libs test"
 
-RESTRICT="!test? ( test )"
+# out-of-source build broken, bug #842060
+RESTRICT="test !test? ( test )"
 
 DOCS=( readme.md )