--- CMakeLists.txt.orig	2020-07-15 18:02:29 UTC
+++ CMakeLists.txt
@@ -2221,7 +2221,7 @@ if (NOT APPLE)
       FILES ${CMAKE_BINARY_DIR}/opencpn.appdata.xml
       DESTINATION ${PREFIX_DATA}/metainfo
     )
-    install(FILES opencpn.1 DESTINATION ${PREFIX_DATA}/man/man1)
+    install(FILES opencpn.1 DESTINATION ${PREFIX_DATA}/../man/man1)
   endif (UNIX)
 
   IF(PACKAGE_FORMAT MATCHES "DEB")