diff --git a/apps/demos/bunnymark/CMakeLists.txt b/apps/demos/bunnymark/CMakeLists.txt
index 49866e8..44fe767 100644
--- a/apps/demos/bunnymark/CMakeLists.txt
+++ b/apps/demos/bunnymark/CMakeLists.txt
@@ -6,7 +6,7 @@ if(NOT CMAKE_BUILD_TYPE)
         set(CMAKE_BUILD_TYPE Debug)
 endif()
 
-add_subdirectory($ENV{TWNROOT} $ENV{TWNBUILDDIR})
+add_subdirectory($ENV{TWNROOT} $ENV{TWNROOT}/build)
 
 set(SOURCE_FILES
         game.c
diff --git a/apps/demos/platformer/CMakeLists.txt b/apps/demos/platformer/CMakeLists.txt
index 6d05e1c..79bbb90 100644
--- a/apps/demos/platformer/CMakeLists.txt
+++ b/apps/demos/platformer/CMakeLists.txt
@@ -6,7 +6,7 @@ if(NOT CMAKE_BUILD_TYPE)
         set(CMAKE_BUILD_TYPE Debug)
 endif()
 
-add_subdirectory($ENV{TWNROOT} $ENV{TWNBUILDDIR})
+add_subdirectory($ENV{TWNROOT} $ENV{TWNROOT}/build)
 
 set(SOURCE_FILES
         game.c
diff --git a/apps/demos/scenery/CMakeLists.txt b/apps/demos/scenery/CMakeLists.txt
index 8e89f40..e399176 100644
--- a/apps/demos/scenery/CMakeLists.txt
+++ b/apps/demos/scenery/CMakeLists.txt
@@ -6,7 +6,7 @@ if(NOT CMAKE_BUILD_TYPE)
         set(CMAKE_BUILD_TYPE Debug)
 endif()
 
-add_subdirectory($ENV{TWNROOT} $ENV{TWNBUILDDIR})
+add_subdirectory($ENV{TWNROOT} $ENV{TWNROOT}/build)
 
 set(SOURCE_FILES
         game.c
diff --git a/apps/template/CMakeLists.txt b/apps/template/CMakeLists.txt
index a3f68ce..55566d7 100644
--- a/apps/template/CMakeLists.txt
+++ b/apps/template/CMakeLists.txt
@@ -6,7 +6,7 @@ if(NOT CMAKE_BUILD_TYPE)
         set(CMAKE_BUILD_TYPE Debug)
 endif()
 
-add_subdirectory($ENV{TWNROOT} $ENV{TWNBUILDDIR})
+add_subdirectory($ENV{TWNROOT} $ENV{TWNROOT}/build)
 
 set(SOURCE_FILES
         game.c
diff --git a/apps/twnlua/CMakeLists.txt b/apps/twnlua/CMakeLists.txt
index 95135cf..e779d6e 100644
--- a/apps/twnlua/CMakeLists.txt
+++ b/apps/twnlua/CMakeLists.txt
@@ -6,7 +6,7 @@ if(NOT CMAKE_BUILD_TYPE)
         set(CMAKE_BUILD_TYPE Debug)
 endif()
 
-add_subdirectory($ENV{TWNROOT} $ENV{TWNBUILDDIR})
+add_subdirectory($ENV{TWNROOT} $ENV{TWNROOT}/build)
 
 add_custom_command(
    OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/luabind.c
diff --git a/bin/twn b/bin/twn
index 95bfdfa..c6e5c1d 100755
--- a/bin/twn
+++ b/bin/twn
@@ -6,7 +6,6 @@ set +e
 exe="$(basename $PWD)"
 toolpath="$(dirname -- "${BASH_SOURCE[0]}")"
 export TWNROOT=$(realpath "$toolpath"/../)
-export TWNBUILDDIR=$(realpath "$toolpath"/../build)
 
 case "$1" in
     build    ) "$toolpath"/build.sh "${@:2}"