diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index b18e4bd9ca3eed10fc14a7ec714c06c0a1ae5170..b64f9b709ff1feff56b2e0a2cc4363bd218a801a 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -21,6 +21,8 @@ jobs:
     env:
       AUTOBUILD_CONFIGURATION: ${{ matrix.configuration }}
       AUTOBUILD_ADDRSIZE: ${{ matrix.addrsize }}
+      # authorizes fetching private constituent packages
+      AUTOBUILD_GITHUB_TOKEN: ${{ secrets.SHARED_AUTOBUILD_GITHUB_TOKEN }}
       AUTOBUILD_INSTALLABLE_CACHE: ${{ github.workspace }}/.autobuild-installables
       AUTOBUILD_VARIABLES_FILE: ${{ github.workspace }}/.build-variables/variables
       AUTOBUILD_VSVER: "170"