diff --git a/contrib/guix/libexec/build.sh b/contrib/guix/libexec/build.sh
index 1ffc22a76bce1..3cb1f67cec6fc 100755
--- a/contrib/guix/libexec/build.sh
+++ b/contrib/guix/libexec/build.sh
@@ -171,6 +171,7 @@ make -C depends --jobs="$JOBS" HOST="$HOST" \
                                    ${SOURCES_PATH+SOURCES_PATH="$SOURCES_PATH"} \
                                    ${BASE_CACHE+BASE_CACHE="$BASE_CACHE"} \
                                    ${SDK_PATH+SDK_PATH="$SDK_PATH"} \
+                                   MULTIPROCESS=1 \
                                    x86_64_linux_CC=x86_64-linux-gnu-gcc \
                                    x86_64_linux_CXX=x86_64-linux-gnu-g++ \
                                    x86_64_linux_AR=x86_64-linux-gnu-gcc-ar \