diff --git a/nix/t1/_sources/generated.json b/nix/t1/_sources/generated.json
index b11295822..26e124b0b 100644
--- a/nix/t1/_sources/generated.json
+++ b/nix/t1/_sources/generated.json
@@ -41,7 +41,7 @@
     },
     "chisel": {
         "cargoLocks": null,
-        "date": "2024-08-06",
+        "date": "2024-08-07",
         "extract": null,
         "name": "chisel",
         "passthru": null,
@@ -53,11 +53,11 @@
             "name": null,
             "owner": "chipsalliance",
             "repo": "chisel",
-            "rev": "e6df4cf02fb68191ea76387f046dc63f7cef9820",
-            "sha256": "sha256-l4hNHDwWYnTC1T8yH58UIFVKszdDOmstK5ljk0R1nhg=",
+            "rev": "8572c28dbcc54a2f20ade462028ed50a2f3209b8",
+            "sha256": "sha256-j76XKUrUCI1g7fgcnaPWgU9KcI2a8T1jOSezOdRpkKI=",
             "type": "github"
         },
-        "version": "e6df4cf02fb68191ea76387f046dc63f7cef9820"
+        "version": "8572c28dbcc54a2f20ade462028ed50a2f3209b8"
     },
     "chisel-interface": {
         "cargoLocks": null,
diff --git a/nix/t1/_sources/generated.nix b/nix/t1/_sources/generated.nix
index 7f390ca9c..f74d22375 100644
--- a/nix/t1/_sources/generated.nix
+++ b/nix/t1/_sources/generated.nix
@@ -27,15 +27,15 @@
   };
   chisel = {
     pname = "chisel";
-    version = "e6df4cf02fb68191ea76387f046dc63f7cef9820";
+    version = "8572c28dbcc54a2f20ade462028ed50a2f3209b8";
     src = fetchFromGitHub {
       owner = "chipsalliance";
       repo = "chisel";
-      rev = "e6df4cf02fb68191ea76387f046dc63f7cef9820";
+      rev = "8572c28dbcc54a2f20ade462028ed50a2f3209b8";
       fetchSubmodules = false;
-      sha256 = "sha256-l4hNHDwWYnTC1T8yH58UIFVKszdDOmstK5ljk0R1nhg=";
+      sha256 = "sha256-j76XKUrUCI1g7fgcnaPWgU9KcI2a8T1jOSezOdRpkKI=";
     };
-    date = "2024-08-06";
+    date = "2024-08-07";
   };
   chisel-interface = {
     pname = "chisel-interface";