[tex-live] Building the "TeX in Practice" format and saving it in a sensible location

[Philip Taylor]

David Carlisle wrote:
>> not the (very obscure, and somewhere I would never think to look) default location ?
> ??? probably you can set the output direction but since the default
> isn't obscure at all, it just uses the current directory, I'd just
> move it afterwards.

But it wasn't the current directory at all :  it wanted to write to c:/users/philip taylor.fujitsu-pc/.texlive2018/texmf-var/web2c ! 

> kpathsea: Running mktexfmt texip.fmt
> The command name is D:\TeX\Live\2018\Bin\win32\mktexfmt
> Running the command D:\TeX\Live\2018\Bin\win32\fmtutil-user.exe
> fmtutil: fmtutil is using the following fmtutil.cnf files (in precedence order):
> fmtutil:   d:/tex/live/2018/texmf-dist/web2c/fmtutil.cnf
> fmtutil: fmtutil is using the following fmtutil.cnf file for writing changes:
> fmtutil:   c:/users/philip taylor.fujitsu-pc/.texlive2018/texmf-config/web2c/fmt
> util.cnf
> fmtutil [INFO]: writing formats under c:/users/philip taylor.fujitsu-pc/.texlive2018/texmf-var/web2c

** Phil.