diff --git a/README.md b/README.md
index cb0f6ad..dbf04c6 100644
--- a/README.md
+++ b/README.md
@@ -4,15 +4,20 @@ Images for [Bend 2](https://github.com/bendlang/bend).
 
 ## Install
 
-With [Bend](https://github.com/bendlang/bend) alone there is nothing to
-install: import ezimg by its hub name and `bend` fetches it from
+ezimg is built and checked on bend 2.0.34.
+
+With [Bend](https://github.com/bendlang/bend) alone there is no install
+step: import ezimg by its hub name and `bend` fetches it from
 [the hub](https://hub.bend-lang.com) into `~/.bend/lib` on the first run.
-`0xde7817074d0d382dc55dfca454298427` is ezimg v1.1.0.
+`emerging-ezimg@1.2.0.0` is ezimg v1.2.0:
 
 ```
-import 0xde7817074d0d382dc55dfca454298427/main.bend as Img
+import emerging-ezimg@1.2.0.0/main.bend as Img
 ```
 
+That name resolves to `0x57618559b9b26dd8415f821176a3e692`.
+To pin by content instead, import `0x57618559b9b26dd8415f821176a3e692/main.bend`.
+
 Or with [ez](https://github.com/Emerging-Patterns/ez), which records the
 package in `ez.toml` (`ez init` makes one):
 
@@ -35,7 +40,7 @@ repeats its level in R, G and B.
 `height`, `size`, `count`, and `fill` are the pixel helpers.
 
 ```
-import 0xde7817074d0d382dc55dfca454298427/main.bend as Img
+import emerging-ezimg@1.2.0.0/main.bend as Img
 
 def main() -> U32:
   Img.width(Img.raster(2, 3, [0, 1, 2, 3, 4, 5]))
diff --git a/ez.lock.toml b/ez.lock.toml
index d45c797..36a46c0 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 = "d5a67600a96ba423f2212bd661a30c1fba38eb55"
-tag = "v1.9.0"
+rev = "91efe4bbaad91953652794ad55be7b49c10a2eff"
+tag = "v1.11.0"
 root = "."
-narHash = "sha256-HmJ8J1xDshBdSWXIiEp48GZ9qHsm+bmpHw06ZWwcDVE="
+narHash = "sha256-0xjoxoByI8PKBrbFy4eYGbKQ3ZVscknZLKkWQroYAUI="
 entry = "main.bend"
diff --git a/ez.toml b/ez.toml
index b5272f9..26d90df 100644
--- a/ez.toml
+++ b/ez.toml
@@ -1,11 +1,11 @@
 [package]
 name = "ezimg"
 entry = "main.bend"
-
+[tools]
 [tools.bolt]
 git = "https://github.com/Emerging-Patterns/bolt"
-rev = "d5a67600a96ba423f2212bd661a30c1fba38eb55"
-tag = "v1.9.0"
+rev = "91efe4bbaad91953652794ad55be7b49c10a2eff"
+tag = "v1.11.0"
 root = "."
-narHash = "sha256-HmJ8J1xDshBdSWXIiEp48GZ9qHsm+bmpHw06ZWwcDVE="
+narHash = "sha256-0xjoxoByI8PKBrbFy4eYGbKQ3ZVscknZLKkWQroYAUI="
 entry = "main.bend"
diff --git a/flake.nix b/flake.nix
index 830ca91..f5d7a34 100644
--- a/flake.nix
+++ b/flake.nix
@@ -24,7 +24,7 @@
       ez = inputs.ez.lib.${system};
       ezBin = inputs.ez.packages.${system}.default;
       bend = inputs.bend.packages.${system}.default;
-      bolt = ez.toolPackage { name = "bolt"; src = self; wrapFlags = [ "--gpu" "off" ]; };
+      bolt = ez.toolPackage { name = "bolt"; src = self; inherit bend; wrapFlags = [ "--gpu" "off" ]; };
       bend-cc = ez.bend-cc;
 
       bench = import ./bench {
@@ -41,21 +41,7 @@
       apps.${system} = bench.apps;
 
       checks.${system} = {
-        # every PROOF.bend on this flake's bend: its first line must be
-        # ALL PROOFS CHECK.
-        proofs = pkgs.runCommand "ezimg-proofs" {
-          nativeBuildInputs = [ bend ];
-          BEND_LIB = ez.bendLib ./ez.lock.toml;
-        } ''
-          export HOME=$TMPDIR
-          cp -r ${self} src && chmod -R u+w src && cd src
-          for p in $(find . -name PROOF.bend -not -path './.ez/*' | sort); do
-            first=$(cd "$(dirname "$p")" && bend "$(basename "$p")" | head -n 1)
-            echo "$p: $first"
-            [ "$first" = "ALL PROOFS CHECK" ] || exit 1
-          done
-          touch $out
-        '';
+        proofs = ez.mkProofs { ez = ezBin; src = self; };
         lint = ez.mkLint { src = self; };
       } // bench.checks;