diff --git a/pkgs/development/compilers/zig/default.nix b/pkgs/development/compilers/zig/default.nix
index e0d9f82bebff..e1a322d7d583 100644
--- a/pkgs/development/compilers/zig/default.nix
+++ b/pkgs/development/compilers/zig/default.nix
@@ -3,6 +3,7 @@
   callPackage,
   llvmPackages_18,
   llvmPackages_19,
+  llvmPackages_20,
   zigVersions ? { },
 }:
 let
@@ -15,6 +16,10 @@ let
       llvmPackages = llvmPackages_19;
       hash = "sha256-DhVJIY/z12PJZdb5j4dnCRb7k1CmeQVOnayYRP8azDI=";
     };
+    "0.15.0" = {
+      llvmPackages = llvmPackages_20;
+      hash = "sha256-gsWK7RUfkXTT/JHN1f5zk0NjBYErs4rhgzA5J5lKnPI=";
+    };
   }
   // zigVersions;
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4c60ad7b5884..bfe0514ef874 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9509,10 +9509,12 @@ with pkgs;
 
       zig_0_13 = zigPackages."0.13";
       zig_0_14 = zigPackages."0.14";
+      zig_0_15 = zigPackages."0.15";
     })
     zigPackages
     zig_0_13
     zig_0_14
+    zig_0_15
     ;
 
   zig = zig_0_14;