diff --git a/src/Elastic.OpenTelemetry.Core/Extensions/ResourceBuilderExtensions.cs b/src/Elastic.OpenTelemetry.Core/Extensions/ResourceBuilderExtensions.cs
index c1096c1b..f6c84399 100644
--- a/src/Elastic.OpenTelemetry.Core/Extensions/ResourceBuilderExtensions.cs
+++ b/src/Elastic.OpenTelemetry.Core/Extensions/ResourceBuilderExtensions.cs
@@ -68,6 +68,9 @@ internal static ResourceBuilder WithElasticDefaultsCore(
 					}
 				}
 
+				// Ensures that environment variables are added last so they can override any previously set attributes.
+				builder.AddEnvironmentVariableDetector();
+
 				configure?.Invoke(builder, builderState);
 			});
 	}