The latest articles on DEV Community by Alex Minutillo (@minutillo). https://dev.to/minutillo https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3910694%2F57091af8-808e-4618-952d-30c0982a2800.png https://dev.to/minutillo en Alex Minutillo Sun, 03 May 2026 17:46:22 +0000 https://dev.to/minutillo/wsl-docker-requirementstxt-error-3g3k https://dev.to/minutillo/wsl-docker-requirementstxt-error-3g3k <p>While setting up Apache Airflow using Docker on Windows 11 WSL, I needed to extend the image to install some python packages. I created a dockerfile and requirements.txt, but every time I ran "docker-compose up --build", I received the error:</p> <p>ERROR: Invalid requirement: '&lt;package-name': Expected semicolon (after name with no version specifier) or end</p> <p>To fix the error, I needed to change the encoding of the requirements.txt file in Windows from "UTF-8" to "ANSI".</p> <p>Sharing in case anyone experiences this error.</p> docker windows python airflow