diff --git a/custom-qt5-libs-build-include b/custom-qt5-libs-build-include
index e57a07a..b555171 100644
--- a/custom-qt5-libs-build-include
+++ b/custom-qt5-libs-build-include
@@ -1,57 +1,59 @@
 # These libs are likely part of your distro
 
 # So you only need to include this file if you compile your own Qt5,
 # to avoid mixing your own Qt with the distro's Qt.
 
 # For okular
 
 module poppler
   repository git://git.freedesktop.org/git/poppler/poppler
   branch master
   cmake-options -DWITH_GLIB=OFF -DLIB_SUFFIX=64
 end module
 
 # For kaccounts-integration
 
 module libaccounts-glib
   # doesn't depend on qt, but this way it's the right version for libaccounts-qt below
   repository https://gitlab.com/accounts-sso/libaccounts-glib.git
   configure-options --disable-man
 end module
 
 module libaccounts-qt
   repository https://gitlab.com/accounts-sso/libaccounts-qt.git
   qmake-options PREFIX=${kdedir}
 end module
 
 module signond
   repository https://gitlab.com/accounts-sso/signond.git
   qmake-options PREFIX=${kdedir}
 end module
 
 # For telepathy-accounts-signon
 
 module libsignon-glib
   # this one does depend on qt, it seems
   repository https://gitlab.com/accounts-sso/libsignon-glib.git
   qmake-options PREFIX=${kdedir}
 end module
 
 # Mandatory for kmouth, optional for kpimtextedit
 
 module qtspeech
   repository git://code.qt.io/qt/qtspeech.git
   branch dev
 end module
 
 # For simon
 
 module sphinxbase
   repository https://github.com/cmusphinx/sphinxbase.git
 end module
 
 module qwt6
   override-url svn://svn.code.sf.net/p/qwt/code/branches/qwt-6.1
+  # The qwt6 build system is very unflexible.
+  # For this to work you need to comment out all lines setting QWT_INSTALL_PREFIX in qwtconfig.pri...
   qmake-options QWT_INSTALL_PREFIX=${kdedir}
 end module