diff --git a/ez.lock.toml b/ez.lock.toml
index 8ba4a79..d45c797 100644
--- a/ez.lock.toml
+++ b/ez.lock.toml
@@ -4,8 +4,8 @@ hub = "https://hub.bend-lang.com"
 [tools]
 [tools.bolt]
 git = "https://github.com/Emerging-Patterns/bolt"
-rev = "02fb09377f5c0fbddb5f6b7c32c8ab4ae14240df"
-tag = "v1.8.0"
+rev = "d5a67600a96ba423f2212bd661a30c1fba38eb55"
+tag = "v1.9.0"
 root = "."
-narHash = "sha256-53zE+3lZ/jn9GvIeGoavvNMaFyUs5dEFWd7fwP49TlM="
+narHash = "sha256-HmJ8J1xDshBdSWXIiEp48GZ9qHsm+bmpHw06ZWwcDVE="
 entry = "main.bend"
diff --git a/ez.toml b/ez.toml
index fbae312..b4cb9a3 100644
--- a/ez.toml
+++ b/ez.toml
@@ -4,8 +4,8 @@ entry = "main.bend"
 
 [tools.bolt]
 git = "https://github.com/Emerging-Patterns/bolt"
-rev = "02fb09377f5c0fbddb5f6b7c32c8ab4ae14240df"
-tag = "v1.8.0"
+rev = "d5a67600a96ba423f2212bd661a30c1fba38eb55"
+tag = "v1.9.0"
 root = "."
-narHash = "sha256-53zE+3lZ/jn9GvIeGoavvNMaFyUs5dEFWd7fwP49TlM="
+narHash = "sha256-HmJ8J1xDshBdSWXIiEp48GZ9qHsm+bmpHw06ZWwcDVE="
 entry = "main.bend"
diff --git a/flake.lock b/flake.lock
index 6ac021f..aa8e418 100644
--- a/flake.lock
+++ b/flake.lock
@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1790359392,
-        "narHash": "sha256-z0Xwg46QesyRnlb7+sQue2GRq90v9M2XVaNVVSdd5Vs=",
+        "lastModified": 1790482124,
+        "narHash": "sha256-Gv309ikt48M8cISbwSo6V0md2572iieIRiyl3noF1cA=",
         "owner": "bendlang",
         "repo": "bend",
-        "rev": "11c65a2572e16d0bfc2e83068b23ed8fb180ccc0",
+        "rev": "af569d4826913b2ce3557e9829ccad31fcf86f94",
         "type": "github"
       },
       "original": {
@@ -20,38 +20,21 @@
         "type": "github"
       }
     },
-    "bend_2": {
-      "inputs": {
-        "nixpkgs": "nixpkgs"
-      },
-      "locked": {
-        "lastModified": 1790200275,
-        "narHash": "sha256-huYLnKbMUukFhFLypIXx/wLVU3EmgsUEe9l67mU6CDw=",
-        "owner": "bendlang",
-        "repo": "bend",
-        "rev": "d37909174ebd664338ae3194799a9e0899dedd51",
-        "type": "github"
-      },
-      "original": {
-        "owner": "bendlang",
-        "repo": "bend",
-        "rev": "d37909174ebd664338ae3194799a9e0899dedd51",
-        "type": "github"
-      }
-    },
     "ez": {
       "inputs": {
-        "bend": "bend_2",
+        "bend": [
+          "bend"
+        ],
         "nixpkgs": [
           "nixpkgs"
         ]
       },
       "locked": {
-        "lastModified": 1790364897,
-        "narHash": "sha256-WBj/Hg/Gys7sIz/IYt204QEGQPjQ/qw0TpcXAYpuGQI=",
+        "lastModified": 1790514265,
+        "narHash": "sha256-NrMlq4aruqBVCNsy9TZtcMayDn3HEhb1I8AyiE233Kw=",
         "owner": "Emerging-Patterns",
         "repo": "ez",
-        "rev": "94d441e9b58e8b6a8a2f6cb8a74ae35d13b47ceb",
+        "rev": "f37f6d20dc144cd74bb0cd51f9ec4e6925826548",
         "type": "github"
       },
       "original": {
@@ -61,22 +44,6 @@
       }
     },
     "nixpkgs": {
-      "locked": {
-        "lastModified": 1790185690,
-        "narHash": "sha256-xJ+X4hBtOcAFGBOe5nAMyMUeF9foJBmIOu3NjBqBycU=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "4975466d324710c576dc11ad614684e6bd8cad8e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
-    "nixpkgs_2": {
       "locked": {
         "lastModified": 1789546076,
         "narHash": "sha256-zVxLZiSnmaaPLwnhj7pwmqe3axBg/C6nG5JZsJMh2g4=",
@@ -96,7 +63,7 @@
       "inputs": {
         "bend": "bend",
         "ez": "ez",
-        "nixpkgs": "nixpkgs_2"
+        "nixpkgs": "nixpkgs"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index 4b80b54..b3e7857 100644
--- a/flake.nix
+++ b/flake.nix
@@ -9,10 +9,7 @@
   inputs.ez = {
     url = "github:Emerging-Patterns/ez";
     inputs.nixpkgs.follows = "nixpkgs";
-    # not `inputs.bend.follows = "bend"`: ez 1.2.0 does not build on bend
-    # 2.0.28, so ez (and `ez prove`, and bolt through mkLint) keep the bend
-    # ez 1.2.0 locks, 2.0.27
-    inputs.bend.url = "github:bendlang/bend/d37909174ebd664338ae3194799a9e0899dedd51";
+    inputs.bend.follows = "bend";
   };
 
   outputs = { self, nixpkgs, ... }@inputs: