=> Bootstrap dependency digest>=20211023: found digest-20220214
ERROR: This package is only available for these platforms: *-*-alpha *-*-hppa *-*-i386  *-*-mlrisc *-*-sparc *-*-powerpc Linux-*-x86_64 NetBSD-*-x86_64.
ERROR: [can-be-built-here.mk] This package has PKG_SKIP_REASON set:
ERROR: [bsd.pkg.mk] smlnj-110.99.9 is not available for NetBSD-11.0-riscv64
*** Error code 1

Stop.
make: stopped making "checksum" in /usr/pkgsrc/lang/smlnj