diff --git a/build-all.sh b/build-all.sh
index 9294ed07..2326b495 100755
--- a/build-all.sh
+++ b/build-all.sh
@@ -24,7 +24,7 @@ HOST_ARGS=""
 
 while [ $# -gt 0 ]; do
     case "$1" in
-    --enable-asserts|--disable-dylib|--with-clang|--thinlto|--use-linker=*)
+    --enable-asserts|--disable-dylib|--with-clang|--thinlto|--use-linker=*|--llvm-repository=*|--llvm-version=*)
         LLVM_ARGS="$LLVM_ARGS $1"
         ;;
     --host-clang|--host-clang=*)
diff --git a/build-llvm.sh b/build-llvm.sh
index d4d3d920..e30fbe3e 100755
--- a/build-llvm.sh
+++ b/build-llvm.sh
@@ -25,6 +25,7 @@ ASSERTSSUFFIX=""
 LLDB=ON
 CLANG_TOOLS_EXTRA=ON
 INSTRUMENTED=OFF
+LLVM_REPOSITORY='https://github.com/llvm/llvm-project.git'
 
 while [ $# -gt 0 ]; do
     case "$1" in
@@ -57,6 +58,12 @@ while [ $# -gt 0 ]; do
     --full-llvm)
         FULL_LLVM=1
         ;;
+    --llvm-repository=*)
+        LLVM_REPOSITORY="${1#*=}"
+        ;;
+    --llvm-version=*)
+        LLVM_VERSION="${1#*=}"
+        ;;
     --host=*)
         HOST="${1#*=}"
         ;;
@@ -121,7 +128,7 @@ if [ ! -d llvm-project ]; then
     mkdir llvm-project
     cd llvm-project
     git init
-    git remote add origin https://github.com/llvm/llvm-project.git
+    git remote add origin "${LLVM_REPOSITORY}"
     cd ..
     CHECKOUT=1
 fi