diff -Naur cadabra-2.0.9999.orig/frontend/gtkmm/CMakeLists.txt cadabra-2.0.9999/frontend/gtkmm/CMakeLists.txt
--- cadabra-2.0.9999.orig/frontend/gtkmm/CMakeLists.txt	2016-12-29 12:45:24.000000000 +0300
+++ cadabra-2.0.9999/frontend/gtkmm/CMakeLists.txt	2016-12-29 12:46:10.000000000 +0300
@@ -76,18 +76,18 @@
 
 
 # Remove old versions of files which we no longer need, to avoid confusion.
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/bin/cadabra-gtk)")
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/bin/cadabra-qt5)")
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/applications/cadabra2.desktop)")
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/applications/cadabra2-gtk.desktop)")
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/64x64/apps/cadabra2.png)")
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/128x128/apps/cadabra2.png)")
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/256x256/apps/cadabra2.png)")
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/scalable/apps/cadabra2.svg)")
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/64x64/apps/cadabra2-gtk.png)")
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/128x128/apps/cadabra2-gtk.png)")
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/256x256/apps/cadabra2-gtk.png)")
-install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/scalable/apps/cadabra2-gtk.svg)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/bin/cadabra-gtk)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/bin/cadabra-qt5)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/applications/cadabra2.desktop)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/applications/cadabra2-gtk.desktop)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/64x64/apps/cadabra2.png)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/128x128/apps/cadabra2.png)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/256x256/apps/cadabra2.png)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/scalable/apps/cadabra2.svg)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/64x64/apps/cadabra2-gtk.png)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/128x128/apps/cadabra2-gtk.png)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/256x256/apps/cadabra2-gtk.png)")
+#install(CODE     "execute_process(COMMAND rm -f ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/scalable/apps/cadabra2-gtk.svg)")
 
 # Install programs.
 #find_program(XDG-DESKTOP-MENU_EXECUTABLE xdg-desktop-menu REQUIRED)