docs: clarify what versions of the NETCONF/YANG libraries are required
Change-Id: Ic0d75370ea4df682b3e61a13d89f231bd651ef7d
diff --git a/README.md b/README.md
index 58af2b0..dc66dfc 100644
--- a/README.md
+++ b/README.md
@@ -15,15 +15,17 @@
* A C++20 compiler
* [Boost](https://www.boost.org/) (we're testing with `1.78`)
* [cmake](https://cmake.org/download/) for managing the build
-* [libyang](https://github.com/CESNET/libyang) **version 2.0** plus the [C++ bindings](https://github.com/CESNET/libyang-cpp)
-* [libnetconf2](https://github.com/CESNET/libnetconf2) **version 2.1** plus the [C++ bindings](https://github.com/CESNET/libnetconf2-cpp) for connecting to NETCONF servers
+* [libyang](https://github.com/CESNET/libyang) **version 2.x** plus the [C++ bindings](https://github.com/CESNET/libyang-cpp)
+* [libnetconf2](https://github.com/CESNET/libnetconf2) **version 2.x** plus the [C++ bindings](https://github.com/CESNET/libnetconf2-cpp) for connecting to NETCONF servers
* [replxx](https://github.com/AmokHuginnsson/replxx) which provides interactive line prompts
* [docopt](https://github.com/docopt/docopt.cpp) for CLI option parsing
* [pkg-config](https://www.freedesktop.org/wiki/Software/pkg-config/) for building
* optionally, [Doctest](https://github.com/onqtam/doctest/) as a C++ unit test framework
* optionally, [trompeloeil](https://github.com/rollbear/trompeloeil) for mock objects in C++
-* optionally, [sysrepo](https://github.com/sysrepo/sysrepo/) **version 2.1** plus the [C++ bindings](https://github.com/sysrepo/sysrepo-cpp) for the local sysrepo backend, and for the comprehensive test suite
-* optionally, [netopeer2](https://github.com/CESNET/netopeer2) **version 2.1** for a test suite
+* optionally, [sysrepo](https://github.com/sysrepo/sysrepo/) **version 2.x** plus the [C++ bindings](https://github.com/sysrepo/sysrepo-cpp) for the local sysrepo backend, and for the comprehensive test suite
+* optionally, [netopeer2](https://github.com/CESNET/netopeer2) **version 2.x** for a test suite
+
+At times the `devel` branch of `libyang`, `sysrepo`, `libnetconf2` and `Netopeer2` might be required due to fresh bugfixes and behavior changes.
The build process uses [CMake](https://cmake.org/runningcmake/).
A quick-and-dirty build with no fancy options can be as simple as `mkdir build && cd build && cmake .. && make && make install`.