diff --git a/dockerfiles/platform-build/Dockerfile b/dockerfiles/platform-build/Dockerfile
index e5cdbd6b948..4db003f0879 100644
--- a/dockerfiles/platform-build/Dockerfile
+++ b/dockerfiles/platform-build/Dockerfile
@@ -68,8 +68,6 @@ RUN git clone --no-checkout https://github.com/${BUILD_USER}/HPCC-Platform.git &
 
 WORKDIR /hpcc-dev/HPCC-Platform/vcpkg
 RUN ./bootstrap-vcpkg.sh
-ARG GITHUB_ACTOR=hpcc-systems
-ARG GITHUB_TOKEN=none
 
 WORKDIR /hpcc-dev/build
 
@@ -84,7 +82,6 @@ RUN --mount=type=secret,id=key,uid=10000 if [[ "${SIGN_MODULES}" != "OFF" ]] ; \
 ARG BUILD_TYPE=RelWithDebInfo
 ARG USE_CPPUNIT=1
 ARG SIGNING_KEYID=HPCCSystems
-ARG SIGNING_PASSPHRASE=none
 RUN --mount=type=secret,id=passphrase,uid=10000 cmake /hpcc-dev/HPCC-Platform \
     -Wno-dev -DCONTAINERIZED=1 \
     -DINCLUDE_PLUGINS=1 -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DUSE_PYTHON2=0 \