src/Pure/Admin/isabelle_cronjob.scala

       List(Remote_Build("Linux A", "lxbroy9",
         options = "-m32 -B -M1x2,2", args = "-N -g timing")),
       List(Remote_Build("Linux B", "lxbroy10", historic = true, history = 90,
         options = "-m32 -B -M1x4,2,4,6", args = "-N -g timing")),
       List(
-        Remote_Build("Mac OS X 10.9 Mavericks", "macbroy2", options = "-m32 -M8", args = "-a",
+        Remote_Build("Mac OS X 10.9 Mavericks", "macbroy2",
+          options = "-m32 -M8 -e ISABELLE_GHC=ghc -e ISABELLE_MLTON=mlton -e ISABELLE_OCAML=ocaml -e ISABELLE_OCAMLC=ocamlc -e ISABELLE_SMLNJ=/mnt/nfsbroy/home/smlnj/bin/sml",
+          args = "-a",
           detect = Build_Log.Prop.build_tags + " IS NULL"),
         Remote_Build("Mac OS X 10.9 Mavericks, quick_and_dirty", "macbroy2",
           options = "-m32 -M8 -t quick_and_dirty", args = "-a -o quick_and_dirty",
           detect = Build_Log.Prop.build_tags + " = " + SQL.string("quick_and_dirty")),
         Remote_Build("Mac OS X 10.9 Mavericks, skip_proofs", "macbroy2",

         Remote_Build("Mac OS X 10.12 Sierra", "macbroy30", options = "-m32 -M2", args = "-a",
           detect = Build_Log.Prop.build_start + " > date '2017-03-03'")),
       List(Remote_Build("Mac OS X 10.10 Yosemite", "macbroy31", options = "-m32 -M2", args = "-a")),
       List(
         Remote_Build("Windows", "vmnipkow9", history = 90, shared_home = false,
-          options = "-m32 -M4", args = "-a",
+          options = "-m32 -M4 -e ISABELLE_OCAML=ocaml -e ISABELLE_OCAMLC=ocamlc",
+          args = "-a",
           detect = Build_Log.Settings.ML_PLATFORM + " = " + SQL.string("x86-windows")),
         Remote_Build("Windows", "vmnipkow9", history = 90, shared_home = false,
-          options = "-m64 -M4", args = "-a",
+          options = "-m64 -M4 -e ISABELLE_OCAML=ocaml -e ISABELLE_OCAMLC=ocamlc",
+          args = "-a",
           detect = Build_Log.Settings.ML_PLATFORM + " = " + SQL.string("x86_64-windows"))))
   }
 
   private def remote_build_history(arg: (String, Int), r: Remote_Build): Logger_Task =
   {