use correct github account for v1.1.0-alpha.4 pre1 downloads

download_test_vectors.sh

@@ -32,8 +32,14 @@ dl_version() {
 	for flavour in "${FLAVOURS[@]}"; do
 		if [[ ! -e "${flavour}.tar.gz" ]]; then
 			echo "Downloading: ${version}/${flavour}.tar.gz"
+            # TODO temporary hack; remove when official v1.0.0-alpha.4 appears
+            if [[ "${version}" == "v1.0.1" ]]; then
+              github_account="ethereum"
+            else
+              github_account="protolambda"
+            fi
 			curl --location --remote-name --silent --show-error \
-				"https://github.com/ethereum/eth2.0-spec-tests/releases/download/${version}/${flavour}.tar.gz" \
+				"https://github.com/${github_account}/eth2.0-spec-tests/releases/download/${version}/${flavour}.tar.gz" \
 				|| {
 					echo "Curl failed. Aborting"
 					rm -f "${flavour}.tar.gz"