If i modify source code, how to re-package or compile?

Troubleshooting
2

so, i find use “make package” command for make mattermost.exe file …

when i use “make package” in /mattermost/mattermost-server/ folder

i got some error, the error is…

Packaging mattermost
rm -Rf dist
mkdir -p dist/mattermost/bin
mkdir -p dist/mattermost/logs
cp -RL config dist/mattermost
cp -RL fonts dist/mattermost
cp -RL templates dist/mattermost
cp -RL i18n dist/mattermost
sed -i'' -e 's|"ConsoleLevel": "DEBUG"|"ConsoleLevel": "INFO"|g' dist/mattermost/config/config.json
sed -i'' -e 's|"SiteURL": "http://localhost:8065"|"SiteURL": ""|g' dist/mattermost/config/config.json
sed -i'' -e 's|"SendEmailNotifications": true,|"SendEmailNotifications": false,|g' dist/mattermost/config/config.json
sed -i'' -e 's|"FeedbackEmail": "test@example.com",|"FeedbackEmail": "",|g' dist/mattermost/config/config.json
sed -i'' -e 's|"SMTPServer": "dockerhost",|"SMTPServer": "",|g' dist/mattermost/config/config.json
sed -i'' -e 's|"SMTPPort": "2500",|"SMTPPort": "",|g' dist/mattermost/config/config.json
mkdir -p dist/mattermost/client
cp -RL ../mattermost-webapp/dist/* dist/mattermost/client
cp build/MIT-COMPILED-LICENSE.md dist/mattermost
cp NOTICE.txt dist/mattermost
cp README.md dist/mattermost
cp /Users/username/go/bin/mattermost dist/mattermost/bin # from native bin dir, not cross-compiled
cp /Users/username/go/bin/platform dist/mattermost/bin # from native bin dir, not cross-compiled
cp: /Users/username/go/bin/platform: No such file or directory
make: *** [package] Error 1

if anyone know solutions, let me know that how to fix it?

thanks!