diff --git a/BUILD.md b/BUILD.md
index 5b1fb20d3..c6b7b809b 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -97,7 +97,22 @@ The path to the rpm packages will be printed when the build is complete.
 
 ### Building a Slackware package
 
-To build a Slackware package, first install [qt5 SlackBuild](http://slackbuilds.org/repository/14.2/libraries/qt5/) (on 15.0 and newer installed by defualt), then set up a [JDK](https://codeberg.org/glowiak/SlackBuilds/raw/branch/master/tgz/adoptium-jdk8.tar.gz). Next, download the [SlackBuild](https://codeberg.org/glowiak/SlackBuilds/raw/branch/master/tgz/polymc.tar.gz), unpack it and type in extracted directory:
+To build a Slackware package, first install [qt5 SlackBuild](http://slackbuilds.org/repository/14.2/libraries/qt5/) (on 15.0 and newer installed by defualt), then set up a [JDK](https://codeberg.org/glowiak/SlackBuilds/raw/branch/master/tgz/adoptium-jdk8.tar.gz).
+
+If you're using Slackware 14.2, update cmake with these commands:
+
+```
+mkdir -p /tmp/SBo
+cd /tmp/SBo
+wget -c https://github.com/Kitware/CMake/releases/download/v3.22.2/cmake-3.22.2.tar.gz
+tar xzvf cmake-3.22.2.tar.gz
+cd cmake-3.22.2
+./configure --prefix=/usr
+make
+sudo make install
+```
+
+Next, download the [SlackBuild](https://codeberg.org/glowiak/SlackBuilds/raw/branch/master/tgz/polymc.tar.gz), unpack it and type in extracted directory:
 
 ```
 sudo ./polymc.SlackBuild # script will do everything, just sit up and wait