MISC: Update readme

README.md

@@ -3,7 +3,7 @@
 [![pipeline status](https://git.iiens.net/martin2018/lektor/badges/master/pipeline.svg)](https://git.iiens.net/martin2018/lektor/-/commits/master)
 [![matrix chat](https://img.shields.io/badge/matrix-%23%23baka--dev--lektor%3Aiiens.net-brightgreen)](https://matrix.to/#/##baka-dev-lektor:iiens.net)
 [![platform support](https://img.shields.io/badge/platform-Linux|FreeBSD-lightgrey)](https://git.iiens.net/martin2018/lektor/-/commits/master)
-[![stable version](https://img.shields.io/badge/version-v2.2-blueviolet)](https://git.iiens.net/martin2018/lektor/-/tags)
+[![stable version](https://img.shields.io/badge/version-v2.3-blueviolet)](https://git.iiens.net/martin2018/lektor/-/tags)
 
 A Karaoke player made to replace the old bash scripts on Sakura.
 
@@ -18,8 +18,8 @@ A Karaoke player made to replace the old bash scripts on Sakura.
 
 ### Prerequisites
 
-- [autotools](https://www.gnu.org/software/autoconf/) only if you change the
-  configuration (if you only edit existing files you won't need it)
+- [autotools](https://www.gnu.org/software/autoconf/), libtool, autoconf,
+  automake, etc
 - a C compiler with C11 support
 - the [sqlite3](https://www.sqlite.org/) development library, version 3.31.0 or
   newer for [generated columns](https://www.sqlite.org/gencol.html) support
@@ -34,6 +34,12 @@ For the module repo, you will need the folowing prerequisites:
 
 - the [libcurl](https://github.com/curl/curl) developmemt library
 
+To build Klkt, you will need:
+
+- libnotify, the developement package
+- glib-2.0, the developpement package
+- qmake and Qt5 developpement libraries (Qt5Core Qt5Gui Qt5Network Qt5Widgets)
+
 You will also need the following executables, with their path setted in the
 configuration file:
 
@@ -62,6 +68,9 @@ If you are developping for lektor, you will need:
 - the [astyle](http://astyle.sourceforge.net/) command line utility, for a
   beautifull and uniform coding style.
 
+> If you are having problems build lektor (AC macros not defined), try copy the
+> `.m4` files from `/usr/share/aclocal` to `config/m4`.
+
 ### Building instructions
 
 The manual way of installing and setting up lektor: