diff --git a/pkgs/development/compilers/zig/default.nix b/pkgs/development/compilers/zig/default.nix
index fd95635616fc..35ad09320dec 100644
--- a/pkgs/development/compilers/zig/default.nix
+++ b/pkgs/development/compilers/zig/default.nix
@@ -1,23 +1,19 @@
 { stdenv, fetchFromGitHub, cmake, llvmPackages, libxml2, zlib }:
 
 stdenv.mkDerivation rec {
-  version = "0.3.0";
-  name = "zig-${version}";
+  version = "0.4.0";
+  pname = "zig";
 
   src = fetchFromGitHub {
     owner = "ziglang";
-    repo = "zig";
-    rev = "${version}";
-    sha256 = "089ywagxjjh7gxv8h8yg7jpmryzjf7n4m5irhdkhp2966d03kyxm";
+    repo = pname;
+    rev = version;
+    sha256 = "1cq6cc5pvybz9kn3y0j5gskkjq88hkmmcsva54mfzpcc65l3pv6p";
   };
 
   nativeBuildInputs = [ cmake ];
   buildInputs = [ llvmPackages.clang-unwrapped llvmPackages.llvm libxml2 zlib ];
 
-  cmakeFlags = [
-    "-DCMAKE_BUILD_TYPE=Release"
-  ];
-
   meta = with stdenv.lib; {
     description = "Programming languaged designed for robustness, optimality, and clarity";
     homepage = https://ziglang.org/;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 2653ad8ae414..549e037dddce 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -13391,7 +13391,7 @@ in
   zmqpp = callPackage ../development/libraries/zmqpp { };
 
   zig = callPackage ../development/compilers/zig {
-    llvmPackages = llvmPackages_7;
+    llvmPackages = llvmPackages_8;
   };
 
   zimlib = callPackage ../development/libraries/zimlib { };