truetype-tracer on 2.8.4-1-gb7824717b

I would like to have NGCGUI on my AXIS, since I have many routines written with this system.

The relevant part on my ini file is as follows

[code]# da linuxcnc.org/docs/html/gui/ngcgui.html#_...gcgui.html#_overview
TKPKG             = Ngcgui    1.0
TKPKG             = Ngcguittt 1.0
; Ngcgui must precede Ngcguittt

NGCGUI_FONT       = Helvetica -12 normal
# specify filenames only, files must be in [RS274NGC]SUBROUTINE_PATH
NGCGUI_PREAMBLE   = mm_std.ngc
NGCGUI_SUBFILE    = touch_plate.ngc
NGCGUI_SUBFILE    = tronca.ngc
NGCGUI_SUBFILE    = 3angoloquadrello.ngc
NGCGUI_SUBFILE    = subroutine_filetta.ngc
NGCGUI_SUBFILE    = rastrema.ngc
NGCGUI_SUBFILE    = sub361funziona.ngc
NGCGUI_SUBFILE    = 361stampog91plus.ngc
NGCGUI_SUBFILE    = 361dentrog91plus.ngc


# specify "" for a custom tab page
NGCGUI_SUBFILE    = ""
NGCGUI_OPTIONS    = noremove

; commentato finche non si trova il font ttf-freefont
TTT               = truetype-tracer
TTT_PREAMBLE      = mm_std.ngc
TTT_POSTAMBLE     = postambolo.ngc


I've downloaded truetype-tracer from here
linuxcnc.org/dists/stretch/base/binary-a...acer_4.1-4_amd64.deb
and installed it via dpkg on buster.

Unfortunately the system complains about a dependency.
[code]ttf-freefont is not installed

The command
[code]apt-cache search ttf-freefont
indicates that the font is not present in the repositories.
I installed
[code]sudo apt install ttf-mscorefonts-installer -y
hoping for some magic solution, but to no avail.

What path should I follow now ?

Yes, I forgot to mention it.

To be more sure, I reinstalled fonts-freefont-ttf and after dpkg-ing the truetype-tracer, I still get the very same warning

truetype-tracer dipende da ttf-freefont; tuttavia:
Il pacchetto ttf-freefont non è installato.