diff --git a/hugr-py/src/hugr/cfg.py b/hugr-py/src/hugr/cfg.py
index 78b997cbb..1d9b364a0 100644
--- a/hugr-py/src/hugr/cfg.py
+++ b/hugr-py/src/hugr/cfg.py
@@ -8,7 +8,8 @@
 
 from typing_extensions import Self
 
-from . import ops, val
+from hugr import ops, val
+
 from .dfg import _DfBase
 from .exceptions import MismatchedExit, NoSiblingAncestor, NotInSameCfg
 from .hugr import Hugr, ParentBuilder
diff --git a/hugr-py/src/hugr/cond_loop.py b/hugr-py/src/hugr/cond_loop.py
index 4bb60bf32..171de3a0e 100644
--- a/hugr-py/src/hugr/cond_loop.py
+++ b/hugr-py/src/hugr/cond_loop.py
@@ -10,7 +10,8 @@
 
 from typing_extensions import Self
 
-from . import ops
+from hugr import ops
+
 from .dfg import _DfBase
 from .hugr import Hugr, ParentBuilder
 
diff --git a/hugr-py/src/hugr/dfg.py b/hugr-py/src/hugr/dfg.py
index 2f8d46697..141e2e15f 100644
--- a/hugr-py/src/hugr/dfg.py
+++ b/hugr-py/src/hugr/dfg.py
@@ -12,7 +12,8 @@
 
 from typing_extensions import Self
 
-from . import ops, tys, val
+from hugr import ops, tys, val
+
 from .exceptions import NoSiblingAncestor
 from .hugr import Hugr, ParentBuilder
 
diff --git a/hugr-py/src/hugr/hugr.py b/hugr-py/src/hugr/hugr.py
index 3ceff24e0..afcd05271 100644
--- a/hugr-py/src/hugr/hugr.py
+++ b/hugr-py/src/hugr/hugr.py
@@ -13,8 +13,7 @@
     overload,
 )
 
-from .exceptions import ParentBeforeChild
-from .node_port import (
+from hugr.node_port import (
     Direction,
     InPort,
     Node,
@@ -24,15 +23,17 @@
     ToNode,
     _SubPort,
 )
-from .ops import Call, Const, DataflowOp, Module, Op
-from .serialization.ops import OpType as SerialOp
-from .serialization.serial_hugr import SerialHugr
-from .tys import Kind, Type, ValueKind
-from .utils import BiMap
-from .val import Value
+from hugr.ops import Call, Const, DataflowOp, Module, Op
+from hugr.serialization.ops import OpType as SerialOp
+from hugr.serialization.serial_hugr import SerialHugr
+from hugr.tys import Kind, Type, ValueKind
+from hugr.utils import BiMap
+from hugr.val import Value
+
+from .exceptions import ParentBeforeChild
 
 if TYPE_CHECKING:
-    from .val import Value
+    from hugr.val import Value
 
 
 @dataclass()
diff --git a/hugr-py/src/hugr/ops.py b/hugr-py/src/hugr/ops.py
index 226a92f64..61621c5f7 100644
--- a/hugr-py/src/hugr/ops.py
+++ b/hugr-py/src/hugr/ops.py
@@ -8,15 +8,15 @@
 
 from typing_extensions import Self
 
-from . import tys, val
-from .node_port import Direction, InPort, Node, OutPort, PortOffset, Wire
-from .serialization import ops as sops
-from .utils import ser_it
+import hugr.serialization.ops as sops
+from hugr import tys, val
+from hugr.node_port import Direction, InPort, Node, OutPort, PortOffset, Wire
+from hugr.utils import ser_it
 
 if TYPE_CHECKING:
     from collections.abc import Sequence
 
-    from .serialization.ops import BaseOp
+    from hugr.serialization.ops import BaseOp
 
 
 @dataclass
diff --git a/hugr-py/src/hugr/serialization/extension.py b/hugr-py/src/hugr/serialization/extension.py
index dcf579d38..fd533e781 100644
--- a/hugr-py/src/hugr/serialization/extension.py
+++ b/hugr-py/src/hugr/serialization/extension.py
@@ -74,8 +74,6 @@ class Extension(ConfiguredBaseModel):
 
     @classmethod
     def get_version(cls) -> str:
-        from hugr.serialization.serial_hugr import serialization_version
-
         return serialization_version()
 
 
diff --git a/hugr-py/src/hugr/tracked_dfg.py b/hugr-py/src/hugr/tracked_dfg.py
index a3867da70..956325653 100644
--- a/hugr-py/src/hugr/tracked_dfg.py
+++ b/hugr-py/src/hugr/tracked_dfg.py
@@ -2,10 +2,10 @@
 
 from collections.abc import Iterable
 
-from . import tys
-from .dfg import Dfg
-from .node_port import Node, Wire
-from .ops import Command, ComWire
+from hugr import tys
+from hugr.dfg import Dfg
+from hugr.node_port import Node, Wire
+from hugr.ops import Command, ComWire
 
 
 class TrackedDfg(Dfg):
diff --git a/hugr-py/src/hugr/tys.py b/hugr-py/src/hugr/tys.py
index f645a5a04..7f81f71dc 100644
--- a/hugr-py/src/hugr/tys.py
+++ b/hugr-py/src/hugr/tys.py
@@ -5,8 +5,8 @@
 from dataclasses import dataclass, field
 from typing import Protocol, runtime_checkable
 
-from .serialization import tys as stys
-from .utils import ser_it
+import hugr.serialization.tys as stys
+from hugr.utils import ser_it
 
 ExtensionId = stys.ExtensionId
 ExtensionSet = stys.ExtensionSet
diff --git a/hugr-py/src/hugr/val.py b/hugr-py/src/hugr/val.py
index 9d7505c4b..7f0a8f249 100644
--- a/hugr-py/src/hugr/val.py
+++ b/hugr-py/src/hugr/val.py
@@ -5,13 +5,13 @@
 from dataclasses import dataclass, field
 from typing import TYPE_CHECKING, Any, Protocol, runtime_checkable
 
-from . import tys
-from .serialization import ops as sops
-from .serialization import tys as stys
-from .utils import ser_it
+import hugr.serialization.ops as sops
+import hugr.serialization.tys as stys
+from hugr import tys
+from hugr.utils import ser_it
 
 if TYPE_CHECKING:
-    from .hugr import Hugr
+    from hugr.hugr import Hugr
 
 
 @runtime_checkable