diff --git a/packages/scdoc/Containerfile b/packages/scdoc/Containerfile
index c9fce09..593b5bc 100644
--- a/packages/scdoc/Containerfile
+++ b/packages/scdoc/Containerfile
@@ -16,6 +16,7 @@ COPY --from=stagex/binutils . /
 COPY --from=stagex/make . /
 RUN tar -xf ${SRC_FILE}
 WORKDIR /scdoc-${VERSION}
+ENV SOURCE_DATE_EPOCH=1
 RUN --network=none <<-EOF
 	set -eux
 	make PREFIX="/usr" -j "$(nproc)"