diff -rupN icemon-3.1.0/cmake/modules/FindDocbook2X.cmake icemon-3.1.0-patched/cmake/modules/FindDocbook2X.cmake
--- icemon-3.1.0/cmake/modules/FindDocbook2X.cmake	2017-04-06 23:20:44.000000000 +0100
+++ icemon-3.1.0-patched/cmake/modules/FindDocbook2X.cmake	2017-07-27 18:25:50.456087163 +0100
@@ -51,7 +51,7 @@ endmacro()
 if (DOCBOOK_TO_MAN_EXECUTABLE)
     _check_docbook2x_executable()
 else()
-    foreach(test_exec docbook2x-man docbook-to-man docbook2man)
+    foreach(test_exec docbook2x-man docbook-to-man db2x_docbook2man docbook2man)
         find_program(DOCBOOK_TO_MAN_EXECUTABLE
             NAMES ${test_exec}
         )