diff --git a/build.sc b/build.sc
index bfd9eb3e0e9..2cf8c7f02c0 100644
--- a/build.sc
+++ b/build.sc
@@ -141,7 +141,6 @@ trait Emulator extends Cross.Module2[String, String] {
       os.proc("firtool",
         generator.chirrtl().path,
         s"--annotation-file=${generator.chiselAnno().path}",
-        "-disable-infer-rw",
         "--disable-annotation-unknown",
         "-dedup",
         "-O=debug",
diff --git a/flake.lock b/flake.lock
index b0128cb6f91..e0cf2cdc548 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,12 +1,15 @@
 {
   "nodes": {
     "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
       "locked": {
-        "lastModified": 1676283394,
-        "narHash": "sha256-XX2f9c3iySLCw54rJ/CZs+ZK6IQy7GXNY4nSOyu2QG4=",
+        "lastModified": 1694529238,
+        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "3db36a8b464d0c4532ba1c7dda728f4576d6d073",
+        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
         "type": "github"
       },
       "original": {
@@ -17,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1676300157,
-        "narHash": "sha256-1HjRzfp6LOLfcj/HJHdVKWAkX9QRAouoh6AjzJiIerU=",
+        "lastModified": 1696019113,
+        "narHash": "sha256-X3+DKYWJm93DRSdC5M6K5hLqzSya9BjibtBsuARoPco=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "545c7a31e5dedea4a6d372712a18e00ce097d462",
+        "rev": "f5892ddac112a1e9b3612c39af1b72987ee5783a",
         "type": "github"
       },
       "original": {
@@ -36,6 +39,21 @@
         "flake-utils": "flake-utils",
         "nixpkgs": "nixpkgs"
       }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index d9a19fcf541..28d32e91fb4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,7 +20,8 @@
           mill
           dtc
           verilator cmake ninja
-          python3 python3Packages.bootstrapped-pip
+          python3
+          python3Packages.pip
           pkgsCross.riscv64-embedded.buildPackages.gcc
           pkgsCross.riscv64-embedded.buildPackages.gdb
           openocd