=> Bootstrap dependency digest>=20010302: found digest-20160304
=> Checksum SHA1 OK for labltk-8.06.3.tar.gz
=> Checksum RMD160 OK for labltk-8.06.3.tar.gz
=> Checksum SHA512 OK for labltk-8.06.3.tar.gz
===> Installing dependencies for labltk-8.06.3nb3
=> Tool dependency gmake>=3.81: found gmake-4.1nb4
=> Tool dependency nbpatch-[0-9]*: found nbpatch-20151107
=> Build dependency xorgproto>=2016.1: found xorgproto-2018.4
=> Build dependency xcb-proto>=1.4: found xcb-proto-1.13
=> Build dependency cwrappers>=20150314: found cwrappers-20180325
=> Full dependency ocaml-findlib>=1.8.0nb1: found ocaml-findlib-1.8.0nb1
=> Full dependency ocaml>=4.06.1: found ocaml-4.06.1
=> Full dependency libX11>=1.1: found libX11-1.6.5nb1
=> Full dependency tk>=8.6.8nb1: found tk-8.6.8nb1
===> Overriding tools for labltk-8.06.3nb3
===> Extracting for labltk-8.06.3nb3
===> Patching for labltk-8.06.3nb3
=> Applying pkgsrc patches for labltk-8.06.3nb3
===> Creating toolchain wrappers for labltk-8.06.3nb3
===> Configuring for labltk-8.06.3nb3
Configuring LablTk...
tcl.h and/or tk.h not found.
Tcl library not found.
test: =: unexpected operator
test: =: unexpected operator
test: =: unexpected operator
test: =: unexpected operator
Tcl library found.
[WARNING] Tk library not found.

** Configuration summary **

The "labltk" library: not supported