diff --git a/flake.lock b/flake.lock
index bf378e2eb..35c1fb29a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -61,11 +61,11 @@
     "src-misoc": {
       "flake": false,
       "locked": {
-        "lastModified": 1636527305,
-        "narHash": "sha256-/2XTejqj0Bo81HaTrlTSWwInnWwsuqnq+CURXbpIrkA=",
+        "lastModified": 1638683371,
+        "narHash": "sha256-sm2SxHmEGfE56+V+joDHMjpOaxg8+t3EJEk1d11C1E0=",
         "ref": "master",
-        "rev": "f5203e406520874e15ab5d070058ef642fc57fd9",
-        "revCount": 2417,
+        "rev": "71b74f87b41c56a6c6d767cdfde0356c15a379a7",
+        "revCount": 2418,
         "submodules": true,
         "type": "git",
         "url": "https://github.com/m-labs/misoc.git"
diff --git a/flake.nix b/flake.nix
index 5fa94518d..f5a29ff4a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -270,7 +270,6 @@
             ln -s $ARTIQ_PATH/firmware/Cargo.lock .
             cargoSetupPostUnpackHook
             cargoSetupPostPatchHook
-            export TARGET_AR=llvm-ar
             ${buildCommand}
             '';
           doCheck = true;
@@ -384,7 +383,6 @@
           packages.x86_64-linux.vivado
           packages.x86_64-linux.openocd-bscanspi
         ];
-        TARGET_AR="llvm-ar";
       };
 
       hydraJobs = {