Add a note about older Ubuntu LTS and CMake.
@@ -45,6 +45,11 @@ sudo apt install -y \
xz-utils
```
+:::note
+Ubuntu 18.04 LTS release packages a version of CMake that is too old. Please upgrade to Ubuntu 20.04 LTS
+or download and install CMake version 3.13.1 or newer manually.
+:::
+
### Fedora
TODO
