diff --git a/pkgs/development/libraries/wapp/default.nix b/pkgs/development/libraries/wapp/default.nix
new file mode 100644
index 00000000000..8c414a28f12
--- /dev/null
+++ b/pkgs/development/libraries/wapp/default.nix
@@ -0,0 +1,32 @@
+{ lib, fetchurl, tcl }:
+
+tcl.mkTclDerivation {
+  pname = "wapp";
+  version = "unstable-2023-05-05";
+
+  src = fetchurl {
+    url = "https://wapp.tcl-lang.org/home/raw/72d0d081e3e6a4aea91ddf429a85cbdf40f9a32d46cccfe81bb75ee50e6cf9cf?at=wapp.tcldir?ci=9d3368116c59ef16";
+    hash = "sha256-poG7dvaiOXMi4oWMQ5t3v7SYEqZLUY/TsWXrTL62xd0=";
+  };
+
+  dontUnpack = true;
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/lib/wapp
+    cp $src $out/lib/wapp/wapp.tcl
+    cat <<EOF > $out/lib/wapp/pkgIndex.tcl
+    package ifneeded wapp 1.0 [list source [file join \$dir wapp.tcl]]
+    EOF
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    homepage = "https://wapp.tcl-lang.org/home/doc/trunk/README.md";
+    description = "A framework for writing web applications in Tcl";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ nat-418 ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4b52924cb15..da9008ac10f 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -24312,6 +24312,8 @@ with pkgs;
 
   wangle = callPackage ../development/libraries/wangle { };
 
+  wapp = callPackage ../development/libraries/wapp { };
+
   wavpack = callPackage ../development/libraries/wavpack { };
 
   wayland = darwin.apple_sdk_11_0.callPackage ../development/libraries/wayland { };