Packages: Put a minimal README.

packages/README.md

@@ -0,0 +1,62 @@
+# Build Windows package on Linux
+
+*This README as tested on Guix with Wine 10.*
+
+## Setup
+
+### Wine
+
+Fist, you need to install Wine:
+
+```shell
+# Debian
+apt install winehq-stable wine64 winetricks
+
+# Guix
+guix install wine64 winetricks
+```
+
+Init a new custom wine prefix:
+
+```shell
+export WINE_PREFIX=$PWD/wine
+wine winecfg
+
+# or use env-wine.sh
+./env-wine.sh wine winecfg
+```
+
+In `winecfg`, set the windows version to Windows 10 and click ok.
+
+### Install windows software
+
+We need to install 7zip and Python into the wine prefix. You can
+install 7zip with the command:
+
+```shell
+./env-wine.sh winetricks apps 7zip
+```
+
+To install Python, you need to download Python installer for windows
+on version 3.10.2. Next use this command to run the installer:
+
+```shell
+./env-wine.sh wine <path-to-python-installer-exe>
+```
+
+And follow the installation procedure without forget to activate setup
+Python PATH. Now this command will work and return 'Python 3.10.2'.
+
+```shell
+$ ./env-wine.sh wine python --version
+Python 3.10.2
+```
+
+## Build package
+
+Now, you can run the scripts to build the windows package:
+
+```shell
+$ ./env-wine.sh wine windows.bat
+
+```

packages/env-wine.sh

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 export WINEPREFIX=$PWD/wine
 export WINEDEBUG=-all
 
-wine $@
+$@