Get the latest WSL on windows 10.
clone a clean copy of core.
This is on Windows 10. Ubuntu looks okay.

allan@DESKTOP-U9EV6QE:$ git clone https://github.com/Bitcoin/Bitcoin.git
Cloning into 'Bitcoin'...
remote: Counting objects: 91026, done.
remote: Compressing objects: 100% (3/3), done.
remote: Total 91026 (delta 5), reused 4 (delta 4), pack-reused 91019
Receiving objects: 100% (91026/91026), 79.40 MiB | 137.00 KiB/s, done.
Resolving deltas: 100% (67842/67842), done.
Checking connectivity... done.
Checking out files: 100% (1491/1491), done.
allan@DESKTOP-U9EV6QE:$ cd
Bitcoin/ .cache/ core/ Desktop/ .subversion/
BitcoinUnlimited/ .ccache/ .dbus/ .gconf/
bu2/ .config/ .dbus-keyrings/ .mozilla/
allan@DESKTOP-U9EV6QE:$ cd Bitcoin
allan@DESKTOP-U9EV6QE:/Bitcoin$ cd depends/
allan@DESKTOP-U9EV6QE:/Bitcoin/depends$ make HOST=x86_64-w64-mingw32
Fetching ccache-3.3.3.tar.bz2 from https://samba.org/ftp/ccache
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 261 100 261 0 0 28 0 0:00:09 0:00:09 --:--:-- 55
100 337k 100 337k 0 0 20729 0 0:00:16 0:00:16 --:--:-- 77660
/home/allan/Bitcoin/depends/work/download/native_ccache-3.3.3/ccache-3.3.3.tar.bz2.temp: OK
Extracting native_ccache...
/home/allan/Bitcoin/depends/sources/ccache-3.3.3.tar.bz2: OK
Preprocessing native_ccache...
Configuring native_ccache...
/bin/sh: 1: Syntax error: "(" unexpected
make: *** [/home/allan/Bitcoin/depends/work/build/x86_64-w64-mingw32/native_ccache/3.3.3-43ca3e6a03b/./.stamp_configured] Error 2
allan@DESKTOP-U9EV6QE:/Bitcoin/depends$