diff --git a/nix/t1/_sources/generated.json b/nix/t1/_sources/generated.json
index 2d600048f..f11a75df1 100644
--- a/nix/t1/_sources/generated.json
+++ b/nix/t1/_sources/generated.json
@@ -61,7 +61,7 @@
     },
     "chisel": {
         "cargoLocks": null,
-        "date": "2024-05-24",
+        "date": "2024-05-30",
         "extract": null,
         "name": "chisel",
         "passthru": null,
@@ -73,11 +73,11 @@
             "name": null,
             "owner": "chipsalliance",
             "repo": "chisel",
-            "rev": "151d63bb110b8939424a8c5e5746b9889b244a30",
-            "sha256": "sha256-sxifgH8ir83aIEIVkhjDXI9V719hAzFsodGmxCvmKT8=",
+            "rev": "99aa9f1e4c557600beb322dd94e74c9f2162ab85",
+            "sha256": "sha256-1H32ranLEZ7GgOAmnKoivCeu6P2UNkw0wfatZvFlK44=",
             "type": "github"
         },
-        "version": "151d63bb110b8939424a8c5e5746b9889b244a30"
+        "version": "99aa9f1e4c557600beb322dd94e74c9f2162ab85"
     },
     "diplomacy": {
         "cargoLocks": null,
diff --git a/nix/t1/_sources/generated.nix b/nix/t1/_sources/generated.nix
index ed5f2fd57..540f8335e 100644
--- a/nix/t1/_sources/generated.nix
+++ b/nix/t1/_sources/generated.nix
@@ -39,15 +39,15 @@
   };
   chisel = {
     pname = "chisel";
-    version = "151d63bb110b8939424a8c5e5746b9889b244a30";
+    version = "99aa9f1e4c557600beb322dd94e74c9f2162ab85";
     src = fetchFromGitHub {
       owner = "chipsalliance";
       repo = "chisel";
-      rev = "151d63bb110b8939424a8c5e5746b9889b244a30";
+      rev = "99aa9f1e4c557600beb322dd94e74c9f2162ab85";
       fetchSubmodules = false;
-      sha256 = "sha256-sxifgH8ir83aIEIVkhjDXI9V719hAzFsodGmxCvmKT8=";
+      sha256 = "sha256-1H32ranLEZ7GgOAmnKoivCeu6P2UNkw0wfatZvFlK44=";
     };
-    date = "2024-05-24";
+    date = "2024-05-30";
   };
   diplomacy = {
     pname = "diplomacy";