diff --git a/.gitignore b/.gitignore
index 8e763b8..0df0b83 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,5 +2,7 @@
 *.ipr
 *.iws
 .gradle
+.DS_Store
 /build
+*/build
 /out
diff --git a/readme.md b/readme.md
index 41ee5cd..dc15d51 100755
--- a/readme.md
+++ b/readme.md
@@ -107,7 +107,7 @@ You will need to use the Gradle wrapper. Just run `gradlew` in the root director
 
 ### Ubuntu
 
-The g++ compiler is required to build the native library. You will need the `g++` package for this. Usually this is already installed.
+The g++ compiler is required to build the native library. You will need to install the `g++` package for this.
 
 You need to install the `libncurses5-dev` package to pick up the ncurses header files. Also worth installing the `ncurses-doc` package too.
 
@@ -128,7 +128,7 @@ You need to install Visual studio, and build from a Visual studio command prompt
 
 ### OS X
 
-The g++ compiler is required to build the native library. You will need to install the XCode tools for this.
+The g++ compiler is required to build the native library. You will need to install the XCode command-line tools for this.
 
 ### Solaris