-† The only non‐Posix programs‡ required are those provided by `libxml2`
- and `libxslt` (which most operating systems provide), but on Linux
- machines the commandline utilities may need to be installed
- separately as **`libxml2-utils`** and **`xsltproc`**.
+† The only non‐Posix programs‡ required (other than G·N·U Make itself,
+ and optionally Git) are those provided by `libxml2` and `libxslt`.
+On most operating systems, these libraries come pre·installed, but on
+ Linux machines the commandline utilities are often packaged
+ separately (as **`libxml2-utils`** and **`xsltproc`**), which may
+ still need to be installed.