diff --git a/packages/ponylang/0.39.0/build.sh b/packages/ponylang/0.39.0/build.sh
deleted file mode 100755
index ec93a10..0000000
--- a/packages/ponylang/0.39.0/build.sh
+++ /dev/null
@@ -1,27 +0,0 @@
-#!/usr/bin/env bash
-
-PREFIX=$(realpath $(dirname $0))
-
-# get sources - only get the latest copy of the relevant files
-git clone -q https://github.com/ponylang/ponyc.git ponyc
-
-cd ponyc
-
-# release commit for 0.39.0
-git reset --hard 85d897b978c5082a1f3264a3a9ad479446d73984
-
-# updates all submodules recursively along their tracking branches
-# i.e. https://github.com/ponylang/ponyc/blob/main/.gitmodules
-git submodule update --recursive --init
-
-# Build the vendored LLVM libraries that are included in the `lib/llvm/src`.
-make libs build_flags="-j$(nproc)"
-# Configure the CMake build directory.
-make configure
-# Will build pony and put it in `build/release`.
-make build
-# Install pony into `$PREFIX`.
-make prefix="$PREFIX" install
-
-cd ..
-rm -rf ponyc
diff --git a/packages/ponylang/0.39.0/compile b/packages/ponylang/0.39.0/compile
deleted file mode 100644
index f00b22c..0000000
--- a/packages/ponylang/0.39.0/compile
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/usr/bin/env bash
-
-# Compile pony file(s)
-rename 's/$/\.pony/' "$@" # Add .pony extension
-ponyc -b out
\ No newline at end of file
diff --git a/packages/ponylang/0.39.0/environment b/packages/ponylang/0.39.0/environment
deleted file mode 100644
index c6ab089..0000000
--- a/packages/ponylang/0.39.0/environment
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/usr/bin/env bash
-
-# Put 'export' statements here for environment variables
-export PATH=$PWD/bin:$PATH
\ No newline at end of file
diff --git a/packages/ponylang/0.39.0/metadata.json b/packages/ponylang/0.39.0/metadata.json
deleted file mode 100644
index 5856c39..0000000
--- a/packages/ponylang/0.39.0/metadata.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "language": "ponylang",
-    "version": "0.39.0",
-    "aliases": ["pony", "ponyc"]
-}
diff --git a/packages/ponylang/0.39.0/run b/packages/ponylang/0.39.0/run
deleted file mode 100644
index 8ac647b..0000000
--- a/packages/ponylang/0.39.0/run
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/bin/bash
-
-# removes the first arg from $@, which is always the filename
-shift
-# runs the <outfile> executable with whatever args are left in $@
-./out "$@"
\ No newline at end of file
diff --git a/packages/ponylang/0.39.0/test.pony b/packages/ponylang/0.39.0/test.pony
deleted file mode 100644
index 556516a..0000000
--- a/packages/ponylang/0.39.0/test.pony
+++ /dev/null
@@ -1,3 +0,0 @@
-actor Main
-  new create(env: Env) =>
-    env.out.print("OK")
diff --git a/runtimes/default.nix b/runtimes/default.nix
index 3e2c7d0..869295a 100644
--- a/runtimes/default.nix
+++ b/runtimes/default.nix
@@ -25,4 +25,5 @@ args: {
     "racket" = import ./racket.nix args;
     "powershell" = import ./powershell.nix args;
     "prolog" = import ./prolog.nix args;
+    "ponylang" = import ./ponylang.nix args;
 }
diff --git a/runtimes/ponylang.nix b/runtimes/ponylang.nix
new file mode 100644
index 0000000..73fc423
--- /dev/null
+++ b/runtimes/ponylang.nix
@@ -0,0 +1,37 @@
+{pkgs, piston, ...}:
+let
+    pkg = pkgs.ponyc; 
+in piston.mkRuntime {
+    language = "ponylang";
+    version = pkg.version;
+    aliases = [
+        "pony"
+        "ponyc"
+    ];
+
+    compile = ''
+        rename 's/$/.pony/' "$@" # Add .pony extension
+        ${pkg}/bin/ponyc -b out
+    '';
+
+    run = ''
+        shift
+        ./out "$@"
+    '';
+
+    tests = [
+        (piston.mkTest {
+            files = {
+                "test.pony" = ''
+                    actor Main
+                        new create(env: Env) =>
+                            env.out.print("OK")
+                '';
+            };
+            args = [];
+            stdin = "";
+            packages = [];
+            main = "test.pony";
+        })
+    ];
+}
\ No newline at end of file