WSL Ubuntu 20.04

   92  cd /usr/pkgsrc/bootstrap/
   93  which g++
   94  which c++
   95  which ccc
   96  apt-get install gcc
   97  sudo apt-get install gcc
   98  sudo apt-get install g++
   99  apt-get update
  100  sudo apt-get update

CF-SV8-G5LVC@makoto 21:53:54/200621(..pkgsrc/bootstrap)% sudo ./bootstrap --prefix=/usr/pkg --pkgdbdir=/var/db/pkgdb

ERROR: Your shell's echo command is not BSD-compatible.
ERROR: Please select another shell by setting the environment
ERROR: variable SH.

CF-SV8-G5LVC@makoto 21:58:32/200621(..pkgsrc/bootstrap)% fc -fild -100
    1  2020-06-21 21:54  sudo ./bootstrap --prefix=/usr/pkg --pkgdbdir=/var/db/pkgdb\n
    2  2020-06-21 21:55  sudo env SH=/usr/bin/ksh ./bootstrap --prefix=/usr/pkg --pkgdbdir=/var/db/pkgdb\n
    3  2020-06-21 21:55  which cc
    4  2020-06-21 21:55  which gcc
    5  2020-06-21 21:55  apt-get install gcc
    6  2020-06-21 21:55  sudo apt-get ksh
    7  2020-06-21 21:56  sudo apt-get install ksh
    8  2020-06-21 21:56  sudo env SH=/usr/bin/ksh ./bootstrap --prefix=/usr/pkg --pkgdbdir=/var/db/pkgdb\n
    9  2020-06-21 21:57  sudo rm -rf work
   10  2020-06-21 21:57  sudo env SH=/usr/bin/ksh ./bootstrap --prefix=/usr/pkg --pkgdbdir=/var/db/pkgdb\n
   11  2020-06-21 21:57  sudo apt-get install gcc
   12  2020-06-21 21:58  which gcc
   13  2020-06-21 21:58  fc -fild -100
   14  2020-06-21 21:59  sudo env SH=/usr/bin/ksh ./bootstrap --prefix=/usr/pkg --pkgdbdir=/var/db/pkgdb\n
   15  2020-06-21 21:59  sudo rm -rf work
   16  2020-06-21 21:59  sudo env SH=/usr/bin/ksh ./bootstrap --prefix=/usr/pkg --pkgdbdir=/var/db/pkgdb\n

===> running: /usr/bin/sh /usr/pkgsrc/bootstrap/work/bin/install-sh -d -o root -g root /usr/pkg/etc

===========================================================================

Please remember to add /usr/pkg/bin to your PATH environment variable
and /usr/pkg/man to your MANPATH environment variable, if necessary.

An example mk.conf file with the settings you provided to "bootstrap"
has been created for you. It can be found in:

      /usr/pkg/etc/mk.conf

You can find extensive documentation of the NetBSD Packages Collection
in /usr/pkgsrc/doc/pkgsrc.txt.

Thank you for using pkgsrc!

===========================================================================

===> bootstrap started: Sun Jun 21 21:59:19 JST 2020
===> bootstrap ended:   Sun Jun 21 22:15:52 JST 2020
CF-SV8-G5LVC@makoto 22:15:52/200621(..pkgsrc/bootstrap)%