diff --git a/flake.nix b/flake.nix
index 8ec5705..5accef8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -64,7 +64,6 @@
             packages = [
               just
               nuget-to-json
-              azure-artifacts-credprovider
               (
                 with dotnetCorePackages;
                   combinePackages [
diff --git a/nuget-to-json b/nuget-to-json
index e255952..4b01cbd 100755
--- a/nuget-to-json
+++ b/nuget-to-json
@@ -61,7 +61,6 @@ done
         [[ -d "$package" ]] || continue
         cd "$package"
         for version in *; do
-
             id=$(xmlstarlet sel -t -v /_:package/_:metadata/_:id "$version"/*.nuspec)
 
             if grep -qxF "$id.$version.nupkg" "$excluded_list"; then
@@ -71,7 +70,6 @@ done
             # packages in the nix store should have an empty metadata file
             # packages installed with 'dotnet tool' may be missing 'source'
             used_source="$(jq -r 'if has("source") then .source elif has("contentHash") then "__unknown" else "" end' "$version"/.nupkg.metadata)"
-
             found=false
 
             if [[ -z "$used_source" || -d "$used_source" ]]; then
@@ -79,13 +77,15 @@ done
             fi
 
             for source in "${remote_sources[@]}"; do
-
                 url="${base_addresses[$source]}$package/$version/$package.$version.nupkg"
-
                 if [[ "$source" == "$used_source" ]]; then
                     hash="$(nix-hash --type sha256 --flat --sri "$version/$package.$version".nupkg)"
                     found=true
                     break
+                else
+                    # do nothing if the package does not already exist
+                    # locally, since nix-prefetch-url does not handle authentication
+                    :
                 fi
             done