diff --git a/lib/galaxy/tool_util/linters/datatypes.py b/lib/galaxy/tool_util/linters/datatypes.py
index cd35f0600fc..d63ba6bd89a 100644
--- a/lib/galaxy/tool_util/linters/datatypes.py
+++ b/lib/galaxy/tool_util/linters/datatypes.py
@@ -18,7 +18,7 @@ if TYPE_CHECKING:
     from galaxy.tool_util.parser import ToolSource
     from galaxy.util.resources import Traversable
 
-DATATYPES_CONF = resource_path(__name__, "datatypes_conf.xml.sample")
+DATATYPES_CONF = os.getenv('DATATYPES_CONF', resource_path(__package__, "datatypes_conf.xml.sample"))
 
 
 def _parse_datatypes(datatype_conf_path: Union[str, "Traversable"]) -> Set[str]: