diff --git a/build-all.sh b/build-all.sh
index d13827a..ba8603d 100755
--- a/build-all.sh
+++ b/build-all.sh
@@ -16,6 +16,7 @@
 
 set -e
 
+HOST_CLANG=
 LLVM_ARGS=""
 MINGW_ARGS=""
 CFGUARD_ARGS="--enable-cfguard"
@@ -26,6 +27,11 @@ while [ $# -gt 0 ]; do
     --enable-asserts)
         LLVM_ARGS="$LLVM_ARGS $1"
         ;;
+    --host-clang|--host-clang=*)
+        HOST_CLANG=${1#--host-clang}
+        HOST_CLANG=${HOST_CLANG#=}
+        HOST_CLANG=${HOST_CLANG:-clang}
+        ;;
     --full-llvm)
         LLVM_ARGS="$LLVM_ARGS $1"
         FULL_LLVM=1
@@ -78,11 +84,11 @@ while [ $# -gt 0 ]; do
     shift
 done
 if [ -z "$PREFIX" ]; then
-    echo "$0 [--enable-asserts] [--disable-dylib] [--full-llvm] [--with-python] [--disable-lldb] [--disable-lldb-mi] [--disable-clang-tools-extra] [--host=triple] [--with-default-win32-winnt=0x601] [--with-default-msvcrt=ucrt] [--enable-cfguard|--disable-cfguard] [--no-runtimes] [--no-tools] [--wipe-runtimes] dest"
+    echo "$0 [--host-clang[=clang]] [--enable-asserts] [--disable-dylib] [--full-llvm] [--with-python] [--disable-lldb] [--disable-lldb-mi] [--disable-clang-tools-extra] [--host=triple] [--with-default-win32-winnt=0x601] [--with-default-msvcrt=ucrt] [--enable-cfguard|--disable-cfguard] [--no-runtimes] [--no-tools] [--wipe-runtimes] dest"
     exit 1
 fi
 
-for dep in git cmake; do
+for dep in git cmake ${HOST_CLANG}; do
     if ! command -v $dep >/dev/null; then
         echo "$dep not installed. Please install it and retry" 1>&2
         exit 1
@@ -90,14 +96,16 @@ for dep in git cmake; do
 done
 
 if [ -z "$NO_TOOLS" ]; then
-    ./build-llvm.sh $PREFIX $LLVM_ARGS $HOST_ARGS
-    if [ -z "$NO_LLDB" ] && [ -z "$NO_LLDB_MI" ]; then
-        ./build-lldb-mi.sh $PREFIX $HOST_ARGS
+    if [ -z "${HOST_CLANG}" ]; then
+        ./build-llvm.sh $PREFIX $LLVM_ARGS $HOST_ARGS
+        if [ -z "$NO_LLDB" ] && [ -z "$NO_LLDB_MI" ]; then
+            ./build-lldb-mi.sh $PREFIX $HOST_ARGS
+        fi
+        if [ -z "$FULL_LLVM" ]; then
+            ./strip-llvm.sh $PREFIX $HOST_ARGS
+        fi
     fi
-    if [ -z "$FULL_LLVM" ]; then
-        ./strip-llvm.sh $PREFIX $HOST_ARGS
-    fi
-    ./install-wrappers.sh $PREFIX $HOST_ARGS
+    ./install-wrappers.sh $PREFIX $HOST_ARGS ${HOST_CLANG:+--host-clang=$HOST_CLANG}
     ./build-mingw-w64-tools.sh $PREFIX $HOST_ARGS
 fi
 if [ -n "$NO_RUNTIMES" ]; then
diff --git a/build-compiler-rt.sh b/build-compiler-rt.sh
index 68ff1f8..33055ac 100755
--- a/build-compiler-rt.sh
+++ b/build-compiler-rt.sh
@@ -81,6 +81,8 @@ else
 fi
 
 cd llvm-project/compiler-rt
+# Use a staging directory in case parts of the resource dir are immutable
+WORKDIR=$(mktemp -d); trap "rm -rf $WORKDIR" 0
 
 for arch in $ARCHS; do
     if [ -n "$SANITIZERS" ]; then
@@ -123,10 +125,16 @@ for arch in $ARCHS; do
         -DCMAKE_CXX_FLAGS_INIT="$CFGUARD_CFLAGS" \
         $SRC_DIR
     cmake --build . ${CORES:+-j${CORES}}
-    cmake --install .
+    cmake --install . --prefix "${WORKDIR}/install"
     mkdir -p "$PREFIX/$arch-w64-mingw32/bin"
     if [ -n "$SANITIZERS" ]; then
-        mv "$CLANG_RESOURCE_DIR/lib/windows/"*.dll "$PREFIX/$arch-w64-mingw32/bin"
+        mv "${WORKDIR}/install/lib/windows/"*.dll "$PREFIX/$arch-w64-mingw32/bin"
     fi
     cd ..
 done
+
+if [ -h "$CLANG_RESOURCE_DIR/include" ]; then
+    # symlink to system headers - skip copy
+    rm -rf ${WORKDIR}/install/include
+fi
+cp -r ${WORKDIR}/install/. $CLANG_RESOURCE_DIR
diff --git a/install-wrappers.sh b/install-wrappers.sh
index 0ce5663..0df42ab 100755
--- a/install-wrappers.sh
+++ b/install-wrappers.sh
@@ -17,9 +17,15 @@
 set -e
 
 unset HOST
+unset HOST_CLANG
 
 while [ $# -gt 0 ]; do
     case "$1" in
+    --host-clang|--host-clang=*)
+        HOST_CLANG=${1#--host-clang}
+        HOST_CLANG=${HOST_CLANG#=}
+        HOST_CLANG=${HOST_CLANG:-clang}
+        ;;
     --host=*)
         HOST="${1#*=}"
         ;;
@@ -30,7 +36,7 @@ while [ $# -gt 0 ]; do
     shift
 done
 if [ -z "$PREFIX" ]; then
-    echo $0 [--host=triple] dest
+    echo $0 [--host=triple] [--host-clang[=clang]] dest
     exit 1
 fi
 mkdir -p "$PREFIX"
@@ -58,6 +64,44 @@ else
     esac
 fi
 
+if [ -n "${HOST_CLANG}" ]; then
+    HOST_CLANG_EXE=$(command -v $HOST_CLANG)
+    HOST_CLANG_VER=$(echo "__clang_major__ __clang_minor__ __clang_patchlevel__" | $HOST_CLANG_EXE -E -P -x c - | xargs printf '%d.%d.%d')
+
+    mkdir -p $PREFIX/bin
+
+    # ex. /usr/lib/llvm-17/lib/clang/17
+    resdir=$($HOST_CLANG -print-resource-dir)
+    # ex. /usr/lib/llvm-17
+    llvmdir=${resdir%/lib/clang/*}
+    # ex /lib/clang/17
+    clangres=${resdir#$llvmdir}
+
+    mkdir -p $PREFIX$clangres
+
+    # link the header directory, prevent modification
+    ln -snf $resdir/include $PREFIX$clangres/include
+
+    # Note: clang will detect the "InstalledDir" based on the path that was used to invoke the tools
+    # This might still have some hidden effects
+    printf '#!/bin/sh\nsr=$(dirname "$(dirname "$(readlink -f "$0")")")\nexec %s -resource-dir="$sr"%s --sysroot="$sr" "$@"\n' "$HOST_CLANG_EXE" "$clangres" > $PREFIX/bin/clang
+    # printf '#!/bin/sh\nsr=$(dirname "$(dirname "$(readlink -f "$0")")")\nexec %s -resource-dir="$sr"%s --sysroot="$sr" "$@"\n' "$(readlink -f "$HOST_CLANG_EXE")" "$clangres" > $PREFIX/bin/clang
+    chmod 755 $PREFIX/bin/clang
+    ln -sf clang $PREFIX/bin/clang++
+    ln -sf clang $PREFIX/bin/clang-cpp
+
+    echo "Using existing clang $HOST_CLANG_EXE ($HOST_CLANG_VER)"
+    $PREFIX/bin/clang -v
+
+    # prefer system llvm installation, but search in llvm private paths (eg. debian does not symlink all tools into /usr/bin)
+    llvmexec="$PATH:$llvmdir/bin"
+
+    for exec in ld.lld llvm-ar llvm-ranlib llvm-nm llvm-objcopy llvm-strip llvm-rc llvm-cvtres \
+                llvm-addr2line llvm-dlltool llvm-readelf llvm-size llvm-strings llvm-addr2line llvm-windres llvm-ml; do
+        execpath=$(PATH=$llvmexec command -v $exec) && ln -sf $execpath $PREFIX/bin/$exec
+    done
+fi
+
 if [ -n "$MACOS_REDIST" ]; then
     : ${MACOS_REDIST_ARCHS:=arm64 x86_64}
     : ${MACOS_REDIST_VERSION:=10.9}