diff --git a/pkgs/development/tools/knightos/z80e/default.nix b/pkgs/development/tools/knightos/z80e/default.nix
new file mode 100644
index 000000000000..6aad8f687e70
--- /dev/null
+++ b/pkgs/development/tools/knightos/z80e/default.nix
@@ -0,0 +1,27 @@
+{ stdenv, fetchFromGitHub, cmake, knightos-scas, readline, SDL2 }:
+
+stdenv.mkDerivation rec {
+  pname = "z80e";
+  version = "0.5.0";
+
+  src = fetchFromGitHub {
+    owner = "KnightOS";
+    repo = "z80e";
+    rev = version;
+    sha256 = "18nnip6nv1pq19bxgd07fv7ci3c5yj8d9cip97a4zsfab7bmbq6k";
+  };
+
+  nativeBuildInputs = [ cmake knightos-scas ];
+
+  buildInputs = [ readline SDL2 ];
+
+  cmakeFlags = [ "-Denable-sdl=YES" ];
+
+  meta = with stdenv.lib; {
+    homepage    = "https://knightos.org/";
+    description = "A Z80 calculator emulator and debugger";
+    license     = licenses.mit;
+    maintainers = with maintainers; [ siraben ];
+    platforms   = platforms.unix;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f3b4ebdcb940..8862024fb8d2 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9338,6 +9338,8 @@ in
 
   knightos-scas = callPackage ../development/tools/knightos/scas { };
 
+  knightos-z80e = callPackage ../development/tools/knightos/z80e { };
+
   kotlin = callPackage ../development/compilers/kotlin { };
 
   lazarus = callPackage ../development/compilers/fpc/lazarus.nix {