diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index ba0892a..d55a7ad 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -42,6 +42,8 @@ jobs:
         run: |
           IMAGE="${{ secrets.WINSOMNIA_REGISTRY }}/winsomnia/${{ steps.envdetect.outputs.repo_slug }}:${GITHUB_REF_NAME}"
 
+          echo ${{ secrets.WINSOMNIA_NUGET_SOURCE }}
+
           docker build \
             --secret id=nuget_username,env=WINSOMNIA_NUGET_USERNAME \
             --secret id=nuget_token,env=WINSOMNIA_NUGET_TOKEN \
diff --git a/Dockerfile b/Dockerfile
index 267e297..c6ed562 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,6 +14,10 @@ FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
 WORKDIR /src
 COPY . .
 
+RUN --mount=type=secret,id=nuget_source \
+    ls -l /run/secrets && \
+    echo "NUGET_SOURCE='$(cat /run/secrets/nuget_source || true)'"
+
 RUN --mount=type=secret,id=nuget_username \
     --mount=type=secret,id=nuget_token \
     --mount=type=secret,id=nuget_source \