diff --git a/container/Dockerfile-fn-musl-macos b/container/Dockerfile-fn-musl-macos
index ca94b0042..e092ab1ba 100644
--- a/container/Dockerfile-fn-musl-macos
+++ b/container/Dockerfile-fn-musl-macos
@@ -4,9 +4,9 @@ COPY . $WORK_DIR
 WORKDIR $WORK_DIR
 ENV OPENSSL_DIR /musl
 RUN rustup target add x86_64-apple-darwin
-RUN PATH="/opt/osxcross/target/bin:$PATH"
-RUN export CC=o64-clang
-RUN export CXX=o64-clang++
+ENV PATH="/opt/osxcross/target/bin:$PATH"
+ENV CC=o64-clang
+ENV CXX=o64-clang++
 RUN cargo build -p finutils --release --target x86_64-apple-darwin
 
 CMD ["sleep", "999999"]
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