diff --git a/pkgs/by-name/ze/zenoh-c/package.nix b/pkgs/by-name/ze/zenoh-c/package.nix
index 39286f61322c..1df4eaac5ac4 100644
--- a/pkgs/by-name/ze/zenoh-c/package.nix
+++ b/pkgs/by-name/ze/zenoh-c/package.nix
@@ -10,18 +10,20 @@
 
 stdenv.mkDerivation rec {
   pname = "zenoh-c";
-  version = "1.4.0"; # nixpkgs-update: no auto update
+  version = "1.9.0"; # nixpkgs-update: no auto update
 
   src = fetchFromGitHub {
     owner = "eclipse-zenoh";
     repo = "zenoh-c";
-    tag = version;
-    hash = "sha256-Mn3diwJgMkYXP9Dn5AqquN1UJ+P+b4QadiXqzzYZK+o=";
+    # tag = version;
+    # Use 1.9.0 PR merge commit with up-to-date Cargo.lock file
+    rev = "8858e129271f4e05bb34d8ae6df3f3d221ef5299";
+    hash = "sha256-rNvtFFM9tRttuBAIrpaYTadFcUe1El7q5t7PNnMEJXA=";
   };
 
   cargoDeps = rustPlatform.fetchCargoVendor {
     inherit src pname version;
-    hash = "sha256-Z9xKC7svGPSuQm4KCKOfGAFOdWgSjBK+/LFT3rAebTg=";
+    hash = "sha256-7xWu9wgZqDzd60buMnF9B6Y5LRkG5C2JWiG7VwgSCvU=";
   };
 
   outputs = [