diff -Naur scidavis-2.4.0/fitPlugins/CMakeLists.txt scidavis-2.4.0_mod/fitPlugins/CMakeLists.txt
--- scidavis-2.4.0/fitPlugins/CMakeLists.txt	2021-05-05 03:51:49.000000000 +0200
+++ scidavis-2.4.0_mod/fitPlugins/CMakeLists.txt	2021-05-12 00:54:37.399699529 +0200
@@ -18,7 +18,8 @@
     RUNTIME DESTINATION fitPlugins
     )
 else()
+  include(GNUInstallDirs)
   install( TARGETS exp_saturation explin fitRational0 fitRational1 planck_wavelength
-    LIBRARY DESTINATION lib/scidavis/plugins
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}/scidavis/plugins
     )
 endif()