GTK: Add Linux build instructions
@@ -22,6 +22,12 @@ You may also need to set your `PKG_CONFIG_PATH`; assuming you have installed `ca
$> PKG_CONFIG_PATH="/usr/local/opt/libffi/lib/pkgconfig" cargo build
```
+#### Linux
+
+On Linux, druid requires gtk+3; see[gtk-rs dependencies] for installation instructions.
+
+run `cargo build`
+
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