--- vigra-1.11.1/config/VigraSetDefaults.cmake.orig	2018-06-06 11:39:57.174456900 +0300
+++ vigra-1.11.1/config/VigraSetDefaults.cmake	2018-06-06 11:40:25.385496400 +0300
@@ -18,7 +18,7 @@
 # running make install, the content of ${DOCDIR}
 # is copied/installed at ${DOCINSTALL}.
 IF(NOT DEFINED DOCINSTALL)
-    SET(DOCINSTALL "doc")
+    SET(DOCINSTALL "share/doc")
 ENDIF()
 SET(DOCINSTALL ${DOCINSTALL}
     CACHE STRING "where to install the documentation (relative to install prefix)"