DOC: Use Makefile instead of manual conan command.

README_SETUP.md

@@ -50,8 +50,7 @@ as compiler. We use [cmake](https://cmake.org/download/) as build tool.
 
 ### Creating a Local Conan Build ##
 
-Building and installing libcaosdb with Conan is just a single command:  
-`conan create . -s "compiler.libcxx=libstdc++11"`
+Building and installing libcaosdb with Conan is just a single command: `make conan-install`
 
 For MacOS, you probably should adjust the option as mentioned above.