diff --git a/pkgs/tools/admin/google-cloud-sdk/default.nix b/pkgs/tools/admin/google-cloud-sdk/default.nix
index 938eed8fb60a..9401523e3456 100644
--- a/pkgs/tools/admin/google-cloud-sdk/default.nix
+++ b/pkgs/tools/admin/google-cloud-sdk/default.nix
@@ -112,6 +112,7 @@ in stdenv.mkDerivation rec {
 
   passthru = {
     inherit components withExtraComponents;
+    updateScript = ./update.sh;
   };
 
   meta = with lib; {
diff --git a/pkgs/tools/admin/google-cloud-sdk/update.sh b/pkgs/tools/admin/google-cloud-sdk/update.sh
index 4a401547eb48..5b400dba3348 100755
--- a/pkgs/tools/admin/google-cloud-sdk/update.sh
+++ b/pkgs/tools/admin/google-cloud-sdk/update.sh
@@ -1,12 +1,12 @@
 #!/usr/bin/env nix-shell
-#! nix-shell -i bash -p nix
+#! nix-shell -i bash -p nix jq curl
 
 CHANNEL_URL="https://dl.google.com/dl/cloudsdk/channels/rapid"
 BASE_URL="$CHANNEL_URL/downloads/google-cloud-sdk"
 
-# Version of Google Cloud SDK from
-# https://cloud.google.com/sdk/docs/release-notes
-VERSION="426.0.0"
+PACKAGE_DIR=$(dirname -- "$0")
+
+VERSION=$(curl "https://storage.googleapis.com/storage/v1/b/cloud-sdk-release/o?delimiter=/&startOffset=google-cloud-sdk-${UPDATE_NIX_OLD_VERSION}&endOffset=google-cloud-sdk-9" | jq --raw-output '.items[-1].name | scan("\\d+\\.\\d+\\.\\d+")')
 
 function genMainSrc() {
     local url="${BASE_URL}-${VERSION}-${1}-${2}.tar.gz"
@@ -45,6 +45,6 @@ EOF
     echo "  };"
     echo "}"
 
-} >data.nix
+} > "${PACKAGE_DIR}/data.nix"
 
-curl "${CHANNEL_URL}/components-v${VERSION}.json" -w "\n" > components.json
+curl "${CHANNEL_URL}/components-v${VERSION}.json" -w "\n" > "${PACKAGE_DIR}/components.json"