Update README.md

Author: ghorsington

README.md

@@ -2,23 +2,18 @@
 
 [![Build Status](https://dev.azure.com/ghorsington/UnityDoorstop/_apis/build/status/NeighTools.UnityDoorstop.Unix?branchName=master)](https://dev.azure.com/ghorsington/UnityDoorstop/_build/latest?definitionId=2&branchName=master)
 
-This is a quick and dirty [UnityDoorstop](https://github.com/NeighTools/UnityDoorstop) equivalent for Linux and macOS.
+This is [UnityDoorstop](https://github.com/NeighTools/UnityDoorstop) equivalent for Linux and macOS.  
+The library makes use of `LD_PRELOAD` and `DYLD_INSERT_LIBRARIES` injection. 
 
-## How to build
+Hooking is done with the help of [plthook](https://github.com/kubo/plthook) modified to work better with older Unity builds.
 
-You need gcc to build this binary
+## How to build
 
-Linux:
-```sh
-gcc -shared -fPIC -o doorstop.so doorstop.c
-```
+You need gcc and make to build this binary
 
-macOS:
-```sh
-gcc -shared -fPIC -o doorstop.dylib doorstop.c plthook_osx.c
-```
+To build both x64 and x86 binaries, run `make`. This can fail on newer macOSes that don't support building x86 binaries.
 
-Or run either `make build_x64` or `make build_x86` depending on your architecture.
+To build a specific version, use `make build_x64` or `make build_x86` depending on your architecture.
 
 ## How to use