How to - troubleshooting the installation on macOS

README.md

@@ -36,6 +36,30 @@ order to run `geval` you need to either add `$HOME/.local/bin` to
 
     PATH="$HOME/.local/bin" geval ...
 
+### Troubleshooting
+
+If you see a message like this:
+
+   Configuring lzma-0.0.0.3...
+   clang: warning: argument unused during compilation: '-nopie' [-Wunused-command-line-argument]
+   Cabal-simple_mPHDZzAJ_2.0.1.0_ghc-8.2.2: Missing dependency on a foreign
+   library:
+   * Missing (or bad) header file: lzma.h
+   This problem can usually be solved by installing the system package that
+   provides this library (you may need the "-dev" version). If the library is
+   already installed but in a non-standard location then you can use the flags
+   --extra-include-dirs= and --extra-lib-dirs= to specify where it is.
+   If the header file does exist, it may contain errors that are caught by the C
+   compiler at the preprocessing stage. In this case you can re-run configure
+   with the verbosity flag -v3 to see the error messages.
+
+It means that you need to install lzma library on your operating
+system. The same might go for pkg-config. On macOS (it's more likely
+to happen on macOS, as these packages are usually installed out of box on Linux), you need to run:
+
+   brew install xz
+   brew install pkg-config
+
 ### Plan B — just download the GEval binary
 
 (Assuming you have a standard 64-bit Linux.)