diff --git a/CI/ci-linux-prepare.sh b/CI/ci-linux-prepare.sh
index bcd93cbf..48929405 100755
--- a/CI/ci-linux-prepare.sh
+++ b/CI/ci-linux-prepare.sh
@@ -42,27 +42,27 @@ fi
 if [ "$QTVERSION" == "qt5.13.0" ]; then
   echo "Using QT5.13.0";
   BUILDPATH="$BUILDPATH-qt5.13.0"
-  OPTIONS="$OPTIONS -DQWT6_INCLUDE_DIR=~/sw/qwt-6.1.4-qt5.13.0/include -DQWT6_LIBRARY_DIR=~/sw/qwt-6.1.4-qt5.13.0/lib -DQWT6_LIBRARY=~/sw/qwt-6.1.4-qt5.13.0/lib/libqwt.so -DQT5_INSTALL_PATH=~/sw/Qt/5.13.0/gcc_64"
+  OPTIONS="$OPTIONS -DQT5_INSTALL_PATH=~/sw/Qt/5.13.0/gcc_64"
 elif [ "$QTVERSION" == "qt5.12.2" ]; then
   echo "Using QT5.12.2";
   BUILDPATH="$BUILDPATH-qt5.12.2"
-  OPTIONS="$OPTIONS -DQWT6_INCLUDE_DIR=~/sw/qwt-6.1.4-qt5.12.2/include -DQWT6_LIBRARY_DIR=~/sw/qwt-6.1.4-qt5.12.2/lib -DQWT6_LIBRARY=~/sw/qwt-6.1.4-qt5.12.2/lib/libqwt.so -DQT5_INSTALL_PATH=~/sw/Qt/5.12.2/gcc_64"
+  OPTIONS="$OPTIONS -DQT5_INSTALL_PATH=~/sw/Qt/5.12.2/gcc_64"
 elif [ "$QTVERSION" == "qt5.11.2" ]; then
   echo "Using QT5.11.2";
   BUILDPATH="$BUILDPATH-qt5.11.2"
-  OPTIONS="$OPTIONS -DQWT6_INCLUDE_DIR=~/sw/qwt-6.1.3-qt5.11.2/include -DQWT6_LIBRARY_DIR=~/sw/qwt-6.1.3-qt5.11.2/lib -DQWT6_LIBRARY=~/sw/qwt-6.1.3-qt5.11.2/lib/libqwt.so -DQT5_INSTALL_PATH=~/sw/Qt/5.11.2/gcc_64"
+  OPTIONS="$OPTIONS -DQT5_INSTALL_PATH=~/sw/Qt/5.11.2/gcc_64"
 elif [ "$QTVERSION" == "qt5.9.0" ]; then
   echo "Using QT5.9.0";
   BUILDPATH="$BUILDPATH-qt5.9.0"
-  OPTIONS="$OPTIONS -DQWT6_INCLUDE_DIR=~/sw/qwt-6.1.3-qt5.9.0/include -DQWT6_LIBRARY_DIR=~/sw/qwt-6.1.3-qt5.9.0/lib -DQWT6_LIBRARY=~/sw/qwt-6.1.3-qt5.9.0/lib/libqwt.so -DQT5_INSTALL_PATH=~/sw/Qt/5.9/gcc_64"
+  OPTIONS="$OPTIONS -DQT5_INSTALL_PATH=~/sw/Qt/5.9/gcc_64"
 elif [ "$QTVERSION" == "qt5.13.2" ]; then
   echo "Using QT5.13.2";
   BUILDPATH="$BUILDPATH-qt5.13.2"
-  OPTIONS="$OPTIONS -DQWT6_INCLUDE_DIR=~/sw/qwt-6.1.4-qt5.13.2/include -DQWT6_LIBRARY_DIR=~/sw/qwt-6.1.4-qt5.13.2/lib -DQWT6_LIBRARY=~/sw/qwt-6.1.4-qt5.13.2/lib/libqwt.so -DQT5_INSTALL_PATH=~/sw/Qt/5.13.2/gcc_64"
+  OPTIONS="$OPTIONS -DQT5_INSTALL_PATH=~/sw/Qt/5.13.2/gcc_64"
 elif [ "$QTVERSION" == "qt5.15.1" ]; then
   echo "Using QT5.15.1";
   BUILDPATH="$BUILDPATH-qt5.15.1"
-  OPTIONS="$OPTIONS -DQWT6_INCLUDE_DIR=~/sw/qwt-6.1.5-qt5.15.1/include -DQWT6_LIBRARY_DIR=~/sw/qwt-6.1.5-qt5.15.1/lib -DQWT6_LIBRARY=~/sw/qwt-6.1.5-qt5.15.1/lib/libqwt.so -DQT5_INSTALL_PATH=~/sw/Qt/5.15.1/gcc_64"
+  OPTIONS="$OPTIONS -DQT5_INSTALL_PATH=~/sw/Qt/5.15.1/gcc_64"
 fi
 
 #=====================================