diff --git a/extra/clang/build b/extra/clang/build
index db8c45ea..416184f5 100755
--- a/extra/clang/build
+++ b/extra/clang/build
@@ -25,5 +25,7 @@ cmake --install build
 
     rmdir "$1/usr/libexec"
 
-    sed -i 's|libexec|lib/clang|' "$1/usr/bin/scan-build"
+    sed 's|libexec|lib/clang|' "$1/usr/bin/scan-build" > _
+    mv -f _ "$1/usr/bin/scan-build"
+    chmod +x "$1/usr/bin/scan-build"
 }