=> Bootstrap dependency digest>=20010302: found digest-20190127
=> 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-8.06.3nb5
=> Tool dependency gmake>=3.81: found gmake-4.2.1nb1
=> Build dependency x11-links>=1.31: found x11-links-1.31
=> Build dependency cwrappers>=20150314: found cwrappers-20180325
=> Full dependency ocaml-findlib>=1.8.1: found ocaml-findlib-1.8.1
=> Full dependency ocaml>=4.08.1nb1: found ocaml-4.08.1nb2
=> Full dependency tk>=8.6.8nb1: found tk-8.6.9.1
===> Overriding tools for labltk-8.06.3nb5
===> Extracting for labltk-8.06.3nb5
===> Patching for labltk-8.06.3nb5
=> Applying pkgsrc patches for labltk-8.06.3nb5
===> Creating toolchain wrappers for labltk-8.06.3nb5
===> Configuring for labltk-8.06.3nb5
Configuring LablTk...
tcl.h and/or tk.h not found.
Tcl library not found.
test: no: unexpected operator
test: no: unexpected operator
test: no: unexpected operator
test: no: unexpected operator
Tcl library found.
[WARNING] Tk library not found.

** Configuration summary **

The "labltk" library: not supported