diff --git a/flake.lock b/flake.lock
index 611e6aad4..3c1693632 100644
--- a/flake.lock
+++ b/flake.lock
@@ -11,11 +11,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1653635602,
-        "narHash": "sha256-8Osaeuo5/Yq4sU4mhsIXwmy7ZX3iDBbAAZF3lu1+KdQ=",
+        "lastModified": 1654007592,
+        "narHash": "sha256-vaDFhE1ItjqtIcinC/6RAJGbj44pxxMUEeQUa3FtgEE=",
         "owner": "m-labs",
         "repo": "artiq-comtools",
-        "rev": "accc6dd0ca1c1c240b906b14c5cb13098a14906b",
+        "rev": "cb73281154656ee8f74db1866859e31bf42755cd",
         "type": "github"
       },
       "original": {
@@ -45,11 +45,11 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1653596629,
-        "narHash": "sha256-3mKHjaIh1XUTo0nzXoBv5wX34hY8wevVxnVaXtqPnjQ=",
+        "lastModified": 1654510461,
+        "narHash": "sha256-YWtJOQ5XsJGWBX1AihD03a+m/OHtG2bdhjFmx18NdRY=",
         "ref": "master",
-        "rev": "76473152e88867a2c9cc1afa58de7f17c72054ba",
-        "revCount": 773,
+        "rev": "8e6e4d6715bdfa4a5639068e4a78e89b714fb8d7",
+        "revCount": 787,
         "type": "git",
         "url": "https://git.m-labs.hk/m-labs/nac3.git"
       },
@@ -60,16 +60,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1653354321,
-        "narHash": "sha256-AMUhX1Ch0KMDWCze6KAntwlJ1iFp0fLK2TTW9Mj85WY=",
+        "lastModified": 1654360807,
+        "narHash": "sha256-wYG86PUkPZ1P/oHsCpepTkb/U26poaEPPp1XFjRsgdA=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b80531b35cbcddcaf74ceb685b3a0847c134cbe1",
+        "rev": "d9794b04bffb468b886c553557489977ae5f4c65",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "release-22.05",
+        "ref": "nixos-22.05",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -92,11 +92,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1653633179,
-        "narHash": "sha256-xyHQ77RXI9Zq9is+9laArq1HnlyubozL+Ht9BEQGXow=",
+        "lastModified": 1654009659,
+        "narHash": "sha256-/X4gbvqbth0B8lYFZNp1WyJ18N3uJakjLGuWTkRPLMQ=",
         "owner": "m-labs",
         "repo": "sipyco",
-        "rev": "438f649864c58fa2eb213030a336864bba3a18a8",
+        "rev": "d2359ebf43e5283b44d7d40c76382463be4b76f6",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index f30fa34fb..3bd832db8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -84,8 +84,8 @@
           '';
 
         nativeBuildInputs = [ pkgs.qt5.wrapQtAppsHook ];
-        # keep llvm_x and lld_x in sync with nac3
-        propagatedBuildInputs = [ pkgs.llvm_13 pkgs.lld_13 nac3.packages.x86_64-linux.nac3artiq-pgo sipyco.packages.x86_64-linux.sipyco artiq-comtools.packages.x86_64-linux.artiq-comtools ]
+        # keep llvm_x in sync with nac3
+        propagatedBuildInputs = [ pkgs.llvm_14 nac3.packages.x86_64-linux.nac3artiq-pgo sipyco.packages.x86_64-linux.sipyco artiq-comtools.packages.x86_64-linux.artiq-comtools ]
           ++ (with pkgs.python3Packages; [ pyqtgraph pygit2 numpy dateutil scipy prettytable pyserial h5py pyqt5 qasync ]);
 
         dontWrapQtApps = true;
@@ -102,8 +102,8 @@
           "--set FONTCONFIG_FILE ${pkgs.fontconfig.out}/etc/fonts/fonts.conf"
         ];
 
-        # FIXME: automatically propagate lld_13 llvm_13 dependencies
-        checkInputs = [ pkgs.lld_13 pkgs.llvm_13 ];
+        # FIXME: automatically propagate llvm_x dependency
+        checkInputs = [ pkgs.llvm_14 ];
         checkPhase = ''
           python -m unittest discover -v artiq.test
           '';
@@ -183,12 +183,12 @@
             };
           };
           nativeBuildInputs = [
-            (pkgs.python3.withPackages(ps: [ ps.jsonschema  migen misoc artiq]))
+            (pkgs.python3.withPackages(ps: [ ps.jsonschema migen misoc artiq]))
             rustPlatform.rust.rustc
             rustPlatform.rust.cargo
-            pkgs.llvmPackages_13.clang-unwrapped
-            pkgs.llvm_13
-            pkgs.lld_13
+            pkgs.llvmPackages_14.clang-unwrapped
+            pkgs.llvm_14
+            pkgs.lld_14
             vivado
             rustPlatform.cargoSetupHook
             cargo-xbuild
@@ -350,9 +350,9 @@
           rustPlatform.rust.rustc
           rustPlatform.rust.cargo
           cargo-xbuild
-          pkgs.llvmPackages_13.clang-unwrapped
-          pkgs.llvm_13
-          pkgs.lld_13
+          pkgs.llvmPackages_14.clang-unwrapped
+          pkgs.llvm_14
+          pkgs.lld_14
           # use the vivado-env command to enter a FHS shell that lets you run the Vivado installer
           packages.x86_64-linux.vivadoEnv
           packages.x86_64-linux.vivado