diff --git a/.travis.yml b/.travis.yml
index 3d95d10..c660413 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -43,10 +43,10 @@ install:
 - git submodule update
 - mkdir out
 - cd out
-- cmake -DNINJA_ARGS="-j 4" -DGN_EXTRA_ARGS="clang_use_chrome_plugins=false" ..
+- cmake -DGN_EXTRA_ARGS="clang_use_chrome_plugins=false" ..
 
 script:
-- make package
+- make -j 4 package
 
 deploy:
   provider: releases
diff --git a/README.md b/README.md
index 88972c0..2836881 100644
--- a/README.md
+++ b/README.md
@@ -209,11 +209,7 @@ perform cross-compiling.
 
 - **NINJA_ARGS**
 
-    Arguments to pass while executing the `ninja` command. For instance, you can
-    define the number of cores you would like to use, in order to speed-up the
-    build process:
-    
-    `cmake -DNINJA_ARGS="-j 4" ..`
+    Arguments to pass while executing the `ninja` command.
 
 - **TARGET_OS**
 
diff --git a/appveyor.yml b/appveyor.yml
index c80a9e2..df06dc7 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -13,7 +13,7 @@ build:
 before_build:
   - cd c:\projects\libwebrtc
   - git submodule update --init --recursive
-  - cmake -G "Visual Studio 14 2015 Win64" -DCMAKE_INSTALL_PREFIX=c:\projects\libwebrtc -DNINJA_ARGS="-j 2" .
+  - cmake -G "Visual Studio 14 2015 Win64" -DCMAKE_INSTALL_PREFIX=c:\projects\libwebrtc .
 
 artifacts:
   - path: libwebrtc-0.0.1-rc.4-win32-x64.7z