diff --git a/.travis.yml b/.travis.yml
index 7721ab0..8d2d632 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,7 +21,7 @@ matrix:
     - name: Windows (VS2017 Win32)
       os: windows
       env:
-        - ARCH: x86
+        - PLATFORM: x86
         - CMAKE_BUILD_TYPE: Release
         - PYTHON_BASE_DIR: "'/c/Python37'"
         - PYTHON_PACKAGE: "'python3 --version 3.7.0 --forcex86'"
@@ -30,7 +30,7 @@ matrix:
     - name: Windows (VS2017 x64)
       os: windows
       env:
-        - ARCH: x64
+        - PLATFORM: x64
         - CMAKE_BUILD_TYPE: Release 
         - PYTHON_BASE_DIR: "'/c/Python37'"
         - PYTHON_PACKAGE: "'python3 --version 3.7.0'"
@@ -46,7 +46,7 @@ before_install:
       brew update;
     fi
   - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
-      export ARCH=${ARCH};
+      export PLATFORM=${PLATFORM};
       export PATH=$PATH:${QT5_BASE_DIR}/bin:${MSBUILD_PATH};
       export PYTHON_PACKAGE=${PYTHON_PACKAGE};
       export CMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE};
@@ -71,14 +71,14 @@ install:
       wget https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.9.2.tar.gz;
       7z x libressl-2.9.2.tar.gz && 7z x libressl-2.9.2.tar;
       cd libressl-2.9.2;
-      cmake . -DCMAKE_INSTALL_PREFIX=$(pwd) -DCMAKE_GENERATOR_PLATFORM=${ARCH};
+      cmake . -DCMAKE_INSTALL_PREFIX=$(pwd) -DCMAKE_GENERATOR_PLATFORM=${PLATFORM};
       cmake --build . --config $CMAKE_BUILD_TYPE --target install;
       export OPENSSL_ROOT_DIR=$(pwd);
       cd ..;
       wget http://www.zlib.net/zlib1211.zip;
       unzip zlib1211.zip;
       cd zlib-1.2.11;
-      cmake . -DCMAKE_INSTALL_PREFIX=$(pwd) -DCMAKE_GENERATOR_PLATFORM=${ARCH};
+      cmake . -DCMAKE_INSTALL_PREFIX=$(pwd) -DCMAKE_GENERATOR_PLATFORM=${PLATFORM};
       cmake --build . --config $CMAKE_BUILD_TYPE --target install;
       export ZLIB_BASE_DIR=$(pwd);
       cd ..;
@@ -86,7 +86,7 @@ install:
       unzip quazip-0.7.3.zip;
       cd quazip-0.7.3;
       sed -i '/ZLIB_LIBRARIES ""/d' ./CMakeLists.txt;
-      cmake . -DCMAKE_INSTALL_PREFIX=$(pwd) -DCMAKE_GENERATOR_PLATFORM=${ARCH} -DCMAKE_PREFIX_PATH=${QT5_BASE_DIR}/lib/cmake -DZLIB_INCLUDE_DIRS=${ZLIB_BASE_DIR} -DZLIB_LIBRARIES=${ZLIB_BASE_DIR}/Release/zlib.lib;
+      cmake . -DCMAKE_INSTALL_PREFIX=$(pwd) -DCMAKE_GENERATOR_PLATFORM=${PLATFORM} -DCMAKE_PREFIX_PATH=${QT5_BASE_DIR}/lib/cmake -DZLIB_INCLUDE_DIRS=${ZLIB_BASE_DIR} -DZLIB_LIBRARIES=${ZLIB_BASE_DIR}/Release/zlib.lib;
       cmake --build . --config $CMAKE_BUILD_TYPE --target install;
       export QUAZIP_BASE_DIR=$(pwd);
       cd ..;
@@ -118,7 +118,7 @@ script:
       cmake . -DCMAKE_PREFIX_PATH="$(brew --prefix qt)" -DPYTHON_INCLUDE_DIR=./pythonincludes -DPythonQt_Python3=OFF -DPYTHONQT_WITH_WEBKIT=OFF -DBUILD_SHARED_LIBS=ON;
       sudo cmake --build . --config $CMAKE_BUILD_TYPE --target install;
     elif [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
-      cmake . -DCMAKE_INSTALL_PREFIX=$(pwd) -DCMAKE_GENERATOR_PLATFORM=${ARCH} -DPythonQt_Python3=ON -DPYTHONQT_WITH_WEBKIT=OFF -DBUILD_SHARED_LIBS=ON -DPYTHON_INCLUDE_DIR=${PYTHON_BASE_DIR}/include -DPYTHON_LIBRARY=${PYTHON_BASE_DIR}/libs/python37.lib;
+      cmake . -DCMAKE_INSTALL_PREFIX=$(pwd) -DCMAKE_GENERATOR_PLATFORM=${PLATFORM} -DPythonQt_Python3=ON -DPYTHONQT_WITH_WEBKIT=OFF -DBUILD_SHARED_LIBS=ON -DPYTHON_INCLUDE_DIR=${PYTHON_BASE_DIR}/include -DPYTHON_LIBRARY=${PYTHON_BASE_DIR}/libs/python37.lib;
       cmake --build . --config $CMAKE_BUILD_TYPE --target install;
     fi
   - export PYTHONQT_BASE_DIR=$(pwd)
@@ -137,7 +137,7 @@ script:
       cmake ..  -DCMAKE_PREFIX_PATH="$(brew --prefix qt)" -DPYTHON_USE_PYTHON3=OFF -DPYTHON_INCLUDE_DIR=./PythonQt/pythonincludes -DPYTHONQT_LIBRARY=/usr/local/lib/libQt5Python27.dylib -DPYTHONQT_INCLUDE_DIR=/usr/local/include/Qt5Python27/PythonQt -DPYTHONQT_QTALL_LIBRARY=/usr/local/lib/libQt5Python27_QtAll.dylib -DPYTHONQT_QTALL_INCLUDE_DIR=/usr/local/include/Qt5Python27/PythonQt;
       make;
     elif [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
-      cmake .. -DCMAKE_INSTALL_PREFIX=$(pwd) -DCMAKE_GENERATOR_PLATFORM=${ARCH} -DCMAKE_PREFIX_PATH=${QT5_BASE_DIR}/lib/cmake -DZLIB_INCLUDE_DIRS=${ZLIB_BASE_DIR} -DQUAZIP_INCLUDE_DIR=${QUAZIP_BASE_DIR}/include/quazip5 -DQUAZIP_LIBRARY=${QUAZIP_BASE_DIR}/lib/quazip5.lib -DPYTHON_INCLUDE_DIR=${PYTHON_BASE_DIR}/include -DPYTHON_LIBRARY=${PYTHON_BASE_DIR}/libs/python37.lib -DPYTHONQT_INCLUDE_DIR=${PYTHONQT_BASE_DIR}/src -DPYTHONQT_LIBRARY=${PYTHONQT_BASE_DIR}/lib/Qt5Python37.lib -DPYTHONQT_QTALL_INCLUDE_DIR=${PYTHONQT_BASE_DIR}/extensions/PythonQt_QtAll -DPYTHONQT_QTALL_LIBRARY=${PYTHONQT_BASE_DIR}/lib/Qt5Python37_QtAll.lib;
+      cmake .. -DCMAKE_INSTALL_PREFIX=$(pwd) -DCMAKE_GENERATOR_PLATFORM=${PLATFORM} -DCMAKE_PREFIX_PATH=${QT5_BASE_DIR}/lib/cmake -DZLIB_INCLUDE_DIRS=${ZLIB_BASE_DIR} -DQUAZIP_INCLUDE_DIR=${QUAZIP_BASE_DIR}/include/quazip5 -DQUAZIP_LIBRARY=${QUAZIP_BASE_DIR}/lib/quazip5.lib -DPYTHON_INCLUDE_DIR=${PYTHON_BASE_DIR}/include -DPYTHON_LIBRARY=${PYTHON_BASE_DIR}/libs/python37.lib -DPYTHONQT_INCLUDE_DIR=${PYTHONQT_BASE_DIR}/src -DPYTHONQT_LIBRARY=${PYTHONQT_BASE_DIR}/lib/Qt5Python37.lib -DPYTHONQT_QTALL_INCLUDE_DIR=${PYTHONQT_BASE_DIR}/extensions/PythonQt_QtAll -DPYTHONQT_QTALL_LIBRARY=${PYTHONQT_BASE_DIR}/lib/Qt5Python37_QtAll.lib;
       cmake --build . --config $CMAKE_BUILD_TYPE; 
     fi
 
diff --git a/tools/qt-installer-windows.qs b/tools/qt-installer-windows.qs
index 5438670..8164790 100644
--- a/tools/qt-installer-windows.qs
+++ b/tools/qt-installer-windows.qs
@@ -1,6 +1,6 @@
 /*
  * Qt Installer script for a non-interactive installation of Qt5 on Windows.
- * Installs the 64-bit package if environment variable ARCH="x64".
+ * Installs the 64-bit package if environment variable PLATFORM="x64".
  */
 
 // jshint strict:false
@@ -13,7 +13,7 @@
 // https://download.qt.io/online/qtsdkrepository/windows_x86/desktop/qt5_5123/Updates.xml
 // Unfortunately it is not possible to disable deps like qt.tools.qtcreator
 var INSTALL_COMPONENTS = [
-    installer.environmentVariable("ARCH") == "x64" ?
+    installer.environmentVariable("PLATFORM") == "x64" ?
     "qt.qt5.5123.win64_msvc2017_64" :
     "qt.qt5.5123.win32_msvc2017",
 ];