diff --git a/build/docker/alpine.Dockerfile b/build/docker/alpine.Dockerfile
index 07f85caee5..66a49420e8 100644
--- a/build/docker/alpine.Dockerfile
+++ b/build/docker/alpine.Dockerfile
@@ -21,6 +21,7 @@ ENV DOTNET_SKIP_FIRST_TIME_EXPERIENCE=1
 # Workarounds https://github.com/dotnet/cli/issues/8738
 ENV DOTNET_INSTALL_SKIP_PREREQS=1
 ENV KOREBUILD_SKIP_RUNTIME_INSTALL=1
+ENV IsAlpineSupported=true
 
 COPY global.json /tmp/global.json
 RUN DOTNET_SDK_VERSION="$(jq -r '.sdk.version' /tmp/global.json)" \
@@ -29,5 +30,3 @@ RUN DOTNET_SDK_VERSION="$(jq -r '.sdk.version' /tmp/global.json)" \
     && mkdir -p /usr/share/dotnet \
     && tar xzf /tmp/dotnet.tar.gz -C /usr/share/dotnet \
     && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet
-
-ENTRYPOINT [ './build.sh', '/p:IsAlpineSupported=true' ]
diff --git a/dockerbuild.sh b/dockerbuild.sh
index 758bf6b082..da7c76ea9d 100755
--- a/dockerbuild.sh
+++ b/dockerbuild.sh
@@ -108,4 +108,5 @@ docker run \
     -v "$DIR:/code/build" \
     ${docker_args[@]+"${docker_args[@]}"} \
     $tagname \
+    ./build.sh \
     ${build_args[@]+"${build_args[@]}"}