diff --git a/hack/dockerfiles/test.buildkit.Dockerfile b/hack/dockerfiles/test.buildkit.Dockerfile
index aa888c3e..0c413e58 100644
--- a/hack/dockerfiles/test.buildkit.Dockerfile
+++ b/hack/dockerfiles/test.buildkit.Dockerfile
@@ -92,11 +92,10 @@ RUN --mount=target=. --mount=target=/root/.cache,type=cache \
 FROM buildkit-base AS buildkitd
 ARG TARGETPLATFORM
 ARG BUILDKITD_TAGS
-ENV BUILDKITD_TAGS="osusergo netgo static_build seccomp ${BUILDKITD_TAGS}"
 RUN --mount=target=. --mount=target=/root/.cache,type=cache \
   --mount=target=/go/pkg/mod,type=cache \
   --mount=source=/tmp/.ldflags,target=/tmp/.ldflags,from=buildkit-version \
-  go build -ldflags "$(cat /tmp/.ldflags) -w -extldflags -static" -tags "${BUILDKITD_TAGS}" -o /usr/bin/buildkitd ./cmd/buildkitd && \
+  go build -ldflags "$(cat /tmp/.ldflags) -w -extldflags -static" -tags "osusergo netgo static_build seccomp ${BUILDKITD_TAGS}" -o /usr/bin/buildkitd ./cmd/buildkitd && \
   file /usr/bin/buildkitd | egrep "statically linked|Windows"
 
 FROM scratch AS binaries-linux