$NetBSD$

Just use sh(1) `read' command to get the confirmation from the user.

--- bin/dasht-docsets-install.orig	2017-08-16 03:30:44.000000000 +0000
+++ bin/dasht-docsets-install
@@ -86,7 +86,7 @@ printf "Installable docsets ($#):\n\n\t%
 trap exit INT # let Control-C abort `xargs -p` when running under bash(1)
 for docset; do
   test -n "$force" || # don't ask for confirmation when it's being forced
-  echo "Install $docset docset [y/N]" | xargs -p | grep -q . || continue
+  { printf "Install $docset docset [y/N]"; read r; [ "$r" = "y" ] || continue ; }
 
   basename="$docset".tgz
   tgz="$DASHT_DOCSETS_DIR/$basename"