better message when ikiwiki is not available

Commands.hs

@@ -47,8 +47,8 @@ type SubCmdCleanup = Annex Bool
 {- Some helper functions are used to build up SubCmdSeek and SubCmdStart
  - functions. -}
 type SubCmdSeekStrings = SubCmdStartString -> SubCmdSeek
-type SubCmdSeekBackendFiles = SubCmdStartBackendFile -> SubCmdSeek
 type SubCmdStartString = String -> SubCmdStart
+type SubCmdSeekBackendFiles = SubCmdStartBackendFile -> SubCmdSeek
 type SubCmdStartBackendFile = (FilePath, Maybe Backend) -> SubCmdStart
 
 data SubCommand = SubCommand {

Makefile

@@ -11,7 +11,7 @@ install:
 # If ikiwiki is available, build static html docs suitable for being
 # shipped in the software package.
 ifeq ($(shell which ikiwiki),)
-IKIWIKI=echo "** ikiwiki not found, skipping building docs" >&2
+IKIWIKI=@echo "** ikiwiki not found, skipping building docs" >&2; true
 else
 IKIWIKI=ikiwiki
 endif