diff --git a/_build.sh b/_build.sh
index ea1c48564..b121e88eb 100755
--- a/_build.sh
+++ b/_build.sh
@@ -1108,47 +1108,43 @@ build_single_target() {
         _CXXFLAGS_GLOBAL+=" -I${tmp}/include/c++/${_TRIPLET}"
         _CXXFLAGS_GLOBAL+=" -I${tmp}/include/c++/backward"
       fi
-    elif [ "${_HOST}" = 'linux' ] && [ "${_OS}" = 'linux' ] && [ "${unamem}" != "${_machine}" ]; then
-      if [ "${_CC}" = 'llvm' ]; then
-        if [ "${_CRT}" != 'musl' ]; then
-          _CFLAGS_GLOBAL+=" -isystem /usr/${_TRIPLETSH}/include"
-          _LDFLAGS_GLOBAL+=" -L/usr/${_TRIPLETSH}/lib"
-          if [ "${_CCRT}" = 'libgcc' ]; then
-            # https://packages.debian.org/testing/all/libgcc-13-dev-arm64-cross/filelist
-            # /usr/lib/gcc-cross/aarch64-linux-gnu/13/
-            tmp="$(find "/usr/lib/gcc-cross/${_TRIPLETSH}" -mindepth 1 -maxdepth 1 -type d | head -n 1 || true)"
-            if [ -z "${tmp}" ]; then
-              >&2 echo '! Error: Failed to detect gcc-cross env root.'
-              exit 1
-            fi
-            _LDFLAGS_GLOBAL+=" -L${tmp}"
-          fi
+    elif [ "${_HOST}" = 'linux' ] && [ "${_OS}" = 'linux' ] && [ "${unamem}" != "${_machine}" ] && [ "${_CRT}" != 'musl' ]; then
+      _CFLAGS_GLOBAL+=" -isystem /usr/${_TRIPLETSH}/include"
+      _LDFLAGS_GLOBAL+=" -L/usr/${_TRIPLETSH}/lib"
+      if [ "${_CCRT}" = 'libgcc' ]; then
+        # https://packages.debian.org/testing/all/libgcc-13-dev-arm64-cross/filelist
+        # /usr/lib/gcc-cross/aarch64-linux-gnu/13/
+        tmp="$(find "/usr/lib/gcc-cross/${_TRIPLETSH}" -mindepth 1 -maxdepth 1 -type d | head -n 1 || true)"
+        if [ -z "${tmp}" ]; then
+          >&2 echo '! Error: Failed to detect gcc-cross env root.'
+          exit 1
         fi
+        _LDFLAGS_GLOBAL+=" -L${tmp}"
       fi
+    fi
 
-      if [ "${_DISTRO}" = 'debian' ]; then
-        # https://packages.debian.org/testing/all/libstdc++-13-dev-arm64-cross/filelist
-        # /usr/aarch64-linux-gnu/include/c++/13/
-        tmp="$(find "/usr/${_TRIPLETSH}/include/c++" -mindepth 1 -maxdepth 1 -type d | head -n 1 || true)"
-        if [ -n "${tmp}" ]; then
-          _CXXFLAGS_GLOBAL+=" -I${tmp}"
-          _CXXFLAGS_GLOBAL+=" -I${tmp}/${_TRIPLETSH}"
-          _CXXFLAGS_GLOBAL+=" -I${tmp}/backward"
+    if [ "${_HOST}" = 'linux' ] && [ "${_OS}" = 'linux' ] && [ "${unamem}" != "${_machine}" ] && [ "${_DISTRO}" = 'debian' ]; then
+      # https://packages.debian.org/testing/all/libstdc++-13-dev-arm64-cross/filelist
+      # /usr/aarch64-linux-gnu/include/c++/13/
+      tmp="$(find "/usr/${_TRIPLETSH}/include/c++" -mindepth 1 -maxdepth 1 -type d | head -n 1 || true)"
+      if [ -n "${tmp}" ]; then
+        _CXXFLAGS_GLOBAL+=" -I${tmp}"
+        _CXXFLAGS_GLOBAL+=" -I${tmp}/${_TRIPLETSH}"
+        _CXXFLAGS_GLOBAL+=" -I${tmp}/backward"
+      else
+        # https://packages.debian.org/trixie/arm64/libstdc++-12-dev/filelist
+        # /usr/include/c++/12/algorithm
+        # /usr/include/aarch64-linux-gnu/c++/12/ext/opt_random.h
+        tmp1="$(find "/usr/include/c++" -mindepth 1 -maxdepth 1 -type d | head -n 1 || true)"
+        tmp2="$(find "/usr/include/${_TRIPLETSH}/c++" -mindepth 1 -maxdepth 1 -type d | head -n 1 || true)"
+        if [ -n "${tmp1}" ] && \
+           [ -n "${tmp2}" ]; then
+          _CXXFLAGS_GLOBAL+=" -I${tmp1}"
+          _CXXFLAGS_GLOBAL+=" -I${tmp2}"
+          _CXXFLAGS_GLOBAL+=" -I${tmp1}/backward"
         else
-          # https://packages.debian.org/trixie/arm64/libstdc++-12-dev/filelist
-          # /usr/include/c++/12/algorithm
-          # /usr/include/aarch64-linux-gnu/c++/12/ext/opt_random.h
-          tmp1="$(find "/usr/include/c++" -mindepth 1 -maxdepth 1 -type d | head -n 1 || true)"
-          tmp2="$(find "/usr/include/${_TRIPLETSH}/c++" -mindepth 1 -maxdepth 1 -type d | head -n 1 || true)"
-          if [ -n "${tmp1}" ] && \
-             [ -n "${tmp2}" ]; then
-            _CXXFLAGS_GLOBAL+=" -I${tmp1}"
-            _CXXFLAGS_GLOBAL+=" -I${tmp2}"
-            _CXXFLAGS_GLOBAL+=" -I${tmp1}/backward"
-          else
-            >&2 echo '! Error: Failed to detect g++-cross env root.'
-            exit 1
-          fi
+          >&2 echo '! Error: Failed to detect g++-cross env root.'
+          exit 1
         fi
       fi
     fi