cloud-hypervisor 39.0 -> 40.0 https://github.com/cloud-hypervisor/cloud-hypervisor/releases
attrpath: cloud-hypervisor
Checking auto update branch...
No auto update branch exists
[version] 
[version] updated version and sha256
[rustCrateVersion] 
[rustCrateVersion] No cargoSha256 or cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorSha256 or vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] skipping because derivation has no updateScript
Diff after rewrites:
diff --git a/pkgs/applications/virtualization/cloud-hypervisor/default.nix b/pkgs/applications/virtualization/cloud-hypervisor/default.nix
index f48b5436f5c6..739dcc41151f 100644
--- a/pkgs/applications/virtualization/cloud-hypervisor/default.nix
+++ b/pkgs/applications/virtualization/cloud-hypervisor/default.nix
@@ -2,13 +2,13 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "cloud-hypervisor";
-  version = "39.0";
+  version = "40.0";
 
   src = fetchFromGitHub {
     owner = "cloud-hypervisor";
     repo = pname;
     rev = "v${version}";
-    hash = "sha256-sMnfeICo/PhpljstTIj4CiE4QBuyVKYD9oWvWf0Ouew=";
+    hash = "sha256-zrMJGdbOukNbzmcTuIcHlwAbJvTzhz53dc4TO/Fplb4=";
   };
 
   cargoLock = {

Received ExitFailure 1 when running
Raw command: /nix/store/f9dymb2m0c5jfzbqi245gm681plyvkyc-nix-2.18.2/bin/nix-build --option sandbox true --arg config "{ allowBroken = true; allowUnfree = true; allowAliases = false; }" --arg overlays "[ ]" -A cloud-hypervisor
nix build failed.
< source = "registry+https://github.com/rust-lang/crates.io-index"
< checksum = "00bedb16a193cc12451873fee2a1bc6550225acece0e36f333e68326c73c8172"
< dependencies = [
<  "proc-macro2",
<  "quote",
2859a2982
>  "zvariant_utils",
2864c2987
< version = "2.0.0"
---
> version = "1.0.1"
2866c2989
< checksum = "fc242db087efc22bd9ade7aa7809e4ba828132edc312871584a6b4391bdf8786"
---
> checksum = "7234f0d811589db492d16893e3f21e8e2fd282e6d01b0cddee310322062cc200"
2870c2993
<  "syn 2.0.66",
---
>  "syn 1.0.109",

ERROR: cargoHash or cargoSha256 is out of date

Cargo.lock is not the same in /build/cargo-vendor-dir

To fix the issue:
1. Set cargoHash/cargoSha256 to an empty string: `cargoHash = "";`
2. Build the derivation and wait for it to fail with a hash mismatch
3. Copy the "got: sha256-..." value back into the cargoHash field
   You should have: cargoHash = "sha256-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX=";