Parse error on defcfg

[B1T3X]

Hey there!
I have just compiled KMonad v0.4.2 on my MacOS machine, running Sonoma 14.3.1 (23D60).
I have migrated from v0.4.1 and now v0.4.2 throws an error with the same .kbd file.
Even if I create a barebones file, I get the same error.

Take this example:

(defcfg
  input  (iokit-name "BT5.0 KB")
  output (dext)

  fallthrough true
  allow-cmd true
)

(defsrc
  esc  1    2    3    4    5    6    7    8    9    0    -    =    bspc
  tab  q    w    e    r    t    y    u    i    o    p    [    ] \
  caps a    s    d    f    g    h    j    k    l    ;    '    ret
  lsft z    x    c    v    b    n    m    ,    .    /       rsft
  lctl lmet lalt       spc                       ralt cmps rctl Fn
  rght
)

(deflayer layer1
  esc  1    2    3    4    5    6    7    8    9    0    -    =    bspc
  tab  q    w    e    r    t    y    u    i    o    p    [    ] \
  caps a    s    d    f    g    h    j    k    l    ;    '    ret
  lsft z    x    c    v    b    n    m    ,    .    /       rsft
  lctl lmet lalt       spc                       ralt cmps rctl Fn
  rght
)

This is the error I get:

kmonad: Parse error at 3:3:
  |
3 |   output (dext)
  |   ^
unexpected 'o'
expecting ')'

If I comment the output setting out I get this: kmonad: Missing setting in 'defcfg': input

I have no idea what the heck is going on O_o

Any and all help will be appreciated!
Thanks

[B1T3X]

A little update, substituting dext with kext works. I thought kext is only for old MacOS versions?