diff --git a/Dockerfile b/Dockerfile
index d8d8b3431c..f853d0d4a8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -392,7 +392,7 @@ ARG BUN_BASE_VERSION=0.1
 
 RUN cd $BUN_DIR && mkdir -p src/bun.js/bindings-obj &&  rm -rf $HOME/.cache zig-cache && make prerelease && \
     mkdir -p $BUN_RELEASE_DIR && \
-    OUTPUT_DIR=/tmp $ZIG_PATH/zig build obj -Drelease-fast -Dtarget=${TRIPLET} -Dcpu=$(echo "${CPU_TARGET}" | tr '-' '_') && \
+    OUTPUT_DIR=/tmp $ZIG_PATH/zig build obj -Drelease-fast -Dtarget="${TRIPLET}" -Dcpu="${CPU_TARGET}" && \
     cp /tmp/bun.o /tmp/bun.${BUN_BASE_VERSION}.$(cat ${BUN_DIR}/build-id).o
 
 FROM scratch as build_release_obj