diff --git a/Dockerfile.pwsh.ubuntu b/Dockerfile.pwsh.ubuntu
index a3610f6..08c3cb2 100644
--- a/Dockerfile.pwsh.ubuntu
+++ b/Dockerfile.pwsh.ubuntu
@@ -19,8 +19,7 @@ RUN apt update -y && apt upgrade -y \
     && git lfs install \
     && curl -fsSL https://code-server.dev/install.sh | sh
 
-RUN source /etc/os-release \
-  && curl -sSL https://packages.microsoft.com/config/ubuntu/24.04/packages-microsoft-prod.deb -o /tmp/ms-prod.deb \
+RUN curl -sSL https://packages.microsoft.com/config/ubuntu/24.04/packages-microsoft-prod.deb -o /tmp/ms-prod.deb \
   && dpkg -i /tmp/ms-prod.deb \
   && rm -f /tmp/ms-prod.deb \
   && apt update \