buildx failed with: ERROR: failed to solve: process "/bin/sh -c if [ \"$WITH_FLANG\" = \"flang\" ]; then export FLANG_OPTION=\"--with-flang\"; else export FLANG_OPTION=\"--without-flang\"; fi && ./autogen.sh && ./configure --with-llvm=$(llvm-config-${LLVM_VERSION} --prefix) $FLANG_OPTION || { cat config.log; exit 1; }" did not complete successfully: exit code: 1