diff --git a/TwinpackShared/TwinpackUtils.cs b/TwinpackShared/TwinpackUtils.cs
index bc87f36..471bdac 100644
--- a/TwinpackShared/TwinpackUtils.cs
+++ b/TwinpackShared/TwinpackUtils.cs
@@ -244,7 +244,7 @@ public static void InstallPackageVersions(ITcPlcLibraryManager libManager, List<
                 _logger.Info($"Installing package {packageVersion.Name} ...");
 
                 var suffix = packageVersion.Compiled == 1 ? "compiled-library" : "library";
-                libManager.InstallLibrary("System", $@"{cachePath ?? DefaultLibraryCachePath}\{packageVersion.Target}\{packageVersion.Name}_{packageVersion.Version}.{suffix}", bOverwrite: true);
+                libManager.InstallLibrary("System", Path.GetFullPath($@"{cachePath ?? DefaultLibraryCachePath}\{packageVersion.Target}\{packageVersion.Name}_{packageVersion.Version}.{suffix}"), bOverwrite: true);
             }
         }