diff --git a/artiq/coredevice/ad9910.py b/artiq/coredevice/ad9910.py
index 1a24a632a..708509d5e 100644
--- a/artiq/coredevice/ad9910.py
+++ b/artiq/coredevice/ad9910.py
@@ -15,21 +15,6 @@ from artiq.coredevice.kasli_i2c import KasliEEPROM  # NAC3TODO
 class ValueError(Exception):
     pass
 
-# NAC3TODO work around https://git.m-labs.hk/M-Labs/nac3/issues/206
-@portable
-def min(a: int32, b: int32) -> int32:
-    if a > b:
-        return b
-    else:
-        return a
-
-@portable
-def max(a: int32, b: int32) -> int32:
-    if a > b:
-        return a
-    else:
-        return b
-
 
 __all__ = [
     "AD9910",
diff --git a/artiq/coredevice/phaser.py b/artiq/coredevice/phaser.py
index a68b5eda8..b37b0382e 100644
--- a/artiq/coredevice/phaser.py
+++ b/artiq/coredevice/phaser.py
@@ -14,14 +14,6 @@ from artiq.coredevice.trf372017 import TRF372017
 class ValueError(Exception):
     pass
 
-# NAC3TODO https://git.m-labs.hk/M-Labs/nac3/issues/201
-@portable
-def abs(x: int32) -> int32:
-    if x > 0:
-        return x
-    else:
-        return -x
-
 
 PHASER_BOARD_ID = 19
 PHASER_ADDR_BOARD_ID = 0x00
diff --git a/flake.lock b/flake.lock
index efcd30abe..8835a0900 100644
--- a/flake.lock
+++ b/flake.lock
@@ -45,11 +45,11 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1646423985,
-        "narHash": "sha256-WXzmupl6WNef65imDgQAvYdU0gRUu3nrbONVgYzQ+/Q=",
+        "lastModified": 1646753161,
+        "narHash": "sha256-jEq+4j90gk+oUDbCLByUhS5uGBSufcQuHMZuVZY2YGk=",
         "ref": "master",
-        "rev": "42fbe8e383bbe454e87dc2c59d8cd3cca67c42f9",
-        "revCount": 625,
+        "rev": "60b3807ab325bee3252bc0c451f0dcd5c4633ab7",
+        "revCount": 637,
         "type": "git",
         "url": "https://git.m-labs.hk/m-labs/nac3.git"
       },