Update README.md

README.md

@@ -21,7 +21,21 @@ Ideally, cloning the repo and opening with GNOME Builder will have the best resu
  $ git clone https://git.valhrafnaz.gay/valhrafnaz/VoidManifest.git
  ```
 
-Alternatively, you can run ninja yourself.
+Alternatively, you can build the project yourself.
+
+```
+$ cd VoidManifest
+$ meson setup builddir
+$ meson compile -C builddir 
+```
+
+To be able to run the executable `./builddir/src/voidmanifest`, you must install the project with meson:
+
+```
+$ meson install -C builddir
+```
+
+Note that only the flatpak version of the program is supported, all issues referencing local installations will be deleted.
 
 ## License