diff --git a/build-llvm.sh b/build-llvm.sh
index 646ece2..856a54d 100755
--- a/build-llvm.sh
+++ b/build-llvm.sh
@@ -31,7 +31,7 @@ while [ $# -gt 0 ]; do
 done
 if [ -z "$CHECKOUT_ONLY" ]; then
     if [ -z "$PREFIX" ]; then
-        echo $0 [--enable-asserts] [--full-llvm] dest
+        echo $0 [--enable-asserts] [--full-llvm] [--host=<triple>] dest
         exit 1
     fi
 
diff --git a/build-mingw-w64.sh b/build-mingw-w64.sh
index e8d2543..9d06534 100755
--- a/build-mingw-w64.sh
+++ b/build-mingw-w64.sh
@@ -28,7 +28,7 @@ while [ $# -gt 0 ]; do
     shift
 done
 if [ -z "$PREFIX" ]; then
-    echo $0 [--skip-include-triplet-prefix] [--with-default-win32-winnt=0x601] [--with-default-msvcrt=ucrt] dest
+    echo $0 [--skip-include-triplet-prefix] [--with-default-win32-winnt=0x601] [--with-default-msvcrt=ucrt] [--host=<triple>] dest
     exit 1
 fi
 
diff --git a/install-wrappers.sh b/install-wrappers.sh
index 925fcbd..5bd0f32 100755
--- a/install-wrappers.sh
+++ b/install-wrappers.sh
@@ -16,7 +16,7 @@ while [ $# -gt 0 ]; do
     shift
 done
 if [ -z "$PREFIX" ]; then
-    echo $0 dest
+    echo $0 [--host=<triple>] dest
     exit 1
 fi
 mkdir -p "$PREFIX"
diff --git a/strip-llvm.sh b/strip-llvm.sh
index 9a57f3b..fb895cb 100755
--- a/strip-llvm.sh
+++ b/strip-llvm.sh
@@ -16,7 +16,7 @@ while [ $# -gt 0 ]; do
     shift
 done
 if [ -z "$PREFIX" ]; then
-    echo $0 dir
+    echo $0 [--host=<triple>] dir
     exit 1
 fi
 cd "$PREFIX"