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diff --git a/README.md b/README.md
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@@ -61,7 +61,7 @@ Linux is the primary platform, the platform which master branch is guaranteed to
 
 # Installation
 ## Posix (Linux, MacOS, OpenBSD, Haiku)
-`./cmake/install.sh`
+Run `./cmake/install.sh` as root user.
 ## Arch Linux
 On Arch Linux, sibs can alternatively be found on aur under the name `sibs-git` (`yay -S sibs-git`).
 ## Windows