alrighty, thank you remnants on rootfs

dev-lang/go/Manifest

@@ -10,5 +10,5 @@ DIST go-linux-ppc64le-bootstrap-1.8.tbz 52211575 BLAKE2B 7a28ec5a381369c4e9415c8
 DIST go-linux-s390x-bootstrap-1.8.tbz 57124869 BLAKE2B 920a176b8f4fc3a816e724324bbb30a383d599e31a0d2093d24797dbcd0e799a662a3589dbb87d2f5dd16df07c4cf8f1e444e87b540ec732746bb025dc9271f8 SHA512 d429cae870d66217ab2e07c74209d3031d97baa4f899b4d70ae6283a1a5b1434b037904c4cfca0b2bc798d5ba0b358c3739e000eccbc74809baf564c5686df5a
 DIST go-solaris-amd64-bootstrap-1.8.tbz 54926326 BLAKE2B 0a45312f090d81ebf46fe5950cb65c059e2801394231e715e94145d1f918eb59b10472b2385e57ebd5cfb9eca0ad7290fb118436486b665520bb540970f971ab SHA512 52b849e5b9a940e10de7ba3df0ebdf6e1c5d631de9581d936c9edf8f38e6bb3314acbc2b2d5202b0528fde2a359d52bc0c6f39acf9b1b614725e4b4a947ed10d
 DIST go1.12.7.src.tar.gz 21976647 BLAKE2B bf0c723f1e02048d91844c7b8908500c83442a8ab7ceeaacdb37d7204f72d80331eab44de54f99411479be8e645b2626fb8a34df0cedbd75fa57c4e1d84d493a SHA512 f84c6b89dea9df21f0efa07564eb80baeee5bc2d68cced5fd645ebb32e9317e60b657afe011c81e7739d8a93e4b4dafa0b4f78431a009d36e05de55f89ed0fd6
-EBUILD go-1.12.7.ebuild 6485 BLAKE2B dcc2f402fc4b7ce9102bee19eaba1e9223ddfeb2b813d6047fe9f7e29239fd8349be5707b372b41f1787d97b473161488ba43a2ca3dc3d90c3b25f0b57c638a9 SHA512 a330f4286ea4f3663b1925d16a26af8254fbac924fd4d1ba852a0991be69f6045d5e88dc62ffe9ba68ac874c89dfa71c44d31568409fd7e2a1d7cc29f8d63aa6
+EBUILD go-1.12.7.ebuild 6488 BLAKE2B 7a969fefd95c21e6cfa2a26d8d50e7321de5882a47c6353987a311eb4f1c8d9de228b079d7735db88fe66ae05b592f1b2adb373c6724c1a76c785f6f662ff21c SHA512 27cf9eb287cc32b3702c0372eb9a88f8bc95d09736dee7c01dd8f832d39cb166f318fb30d7d712777e40a09874f35a2f37fc0458900bffc75595f1dfaf222c80
 MISC metadata.xml 591 BLAKE2B 9c8a6f1a3abc49749ae22e02e7ec73cc44b829ad43407f474d0cca6a2881afb01e1f11329d8a45c30b47cb47b4967750703f8b1ce8ea7922496e620a5f44821b SHA512 bc398bdbc2453ea152188cb0ad68fd1280ff32fcc018e99195799ea48a34968e2f763a936c9c8b2a01825fd0ad5830fade09dd96ee7032ff6e9b6199b0530ad4

dev-lang/go/go-1.12.7.ebuild

@@ -180,7 +180,7 @@ src_compile()
 			die "go-$(gcc-major-version): command not found"
 		ln -s "${go_binary}" "${GOROOT_BOOTSTRAP}/bin/go" || die
 	elif use system-bootstrap; then
-		export GOROOT_BOOTSTRAP="${EPREFIX}"/usr/lib/go
+		export GOROOT_BOOTSTRAP="${EPREFIX}"/usr/lib/go1.4
 	fi
 	export GOROOT_FINAL="${EPREFIX}"/usr/lib/go
 	export GOROOT="$(pwd)"