diff --git a/packages/mono/6.12.0/build.sh b/packages/mono/6.12.0/build.sh
deleted file mode 100755
index 7bb4b63..0000000
--- a/packages/mono/6.12.0/build.sh
+++ /dev/null
@@ -1,32 +0,0 @@
-#!/bin/bash
-
-PREFIX=$(realpath $(dirname $0))
-
-mkdir -p build/mono build/mono-basic
-cd build
-
-curl "https://download.mono-project.com/sources/mono/mono-6.12.0.122.tar.xz" -o mono.tar.xz
-curl -L "https://github.com/mono/mono-basic/archive/refs/tags/4.7.tar.gz" -o mono-basic.tar.gz
-tar xf mono.tar.xz --strip-components=1 -C mono
-tar xf mono-basic.tar.gz --strip-components=1 -C mono-basic
-
-# Compiling Mono
-cd mono
-
-./configure --prefix "$PREFIX"
-
-make -j$(nproc)
-make install -j$(nproc)
-
-export PATH="$PREFIX/bin:$PATH"  # To be able to use mono commands
-
-# Compiling mono-basic
-cd ../mono-basic
-./configure --prefix="$PREFIX"
-
-make -j$(nproc) PLATFORM="linux"  # Avoids conflict with the $PLATFORM variable we have
-make install -j$(nproc) PLATFORM="linux"
-
-# Remove redundant files
-cd ../../
-rm -rf build
diff --git a/packages/mono/6.12.0/compile b/packages/mono/6.12.0/compile
deleted file mode 100644
index 5246bc2..0000000
--- a/packages/mono/6.12.0/compile
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/bash
-
-case "${PISTON_LANGUAGE}" in
-    csharp)
-        rename 's/$/\.cs/' "$@" # Add .cs extension
-        csc -out:out *.cs
-        ;;
-    basic)
-        rename 's/$/\.vb/' "$@" # Add .vb extension
-        vbnc -out:out *.vb
-        ;;
-    *)
-        echo "How did you get here? (${PISTON_LANGUAGE})"
-        exit 1
-        ;;
-esac
diff --git a/packages/mono/6.12.0/environment b/packages/mono/6.12.0/environment
deleted file mode 100644
index 977a5e8..0000000
--- a/packages/mono/6.12.0/environment
+++ /dev/null
@@ -1 +0,0 @@
-export PATH=$PWD/bin:$PATH
diff --git a/packages/mono/6.12.0/metadata.json b/packages/mono/6.12.0/metadata.json
deleted file mode 100644
index 3f483a4..0000000
--- a/packages/mono/6.12.0/metadata.json
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-    "language": "mono",
-    "version": "6.12.0",
-    "provides": [
-        {
-            "language": "csharp",
-            "aliases": ["mono", "mono-csharp", "mono-c#", "mono-cs", "c#", "cs"]
-        },
-        {
-            "language": "basic",
-            "aliases": [
-                "vb",
-                "mono-vb",
-                "mono-basic",
-                "visual-basic",
-                "visual basic"
-            ]
-        }
-    ]
-}
diff --git a/packages/mono/6.12.0/run b/packages/mono/6.12.0/run
deleted file mode 100644
index 5a2e015..0000000
--- a/packages/mono/6.12.0/run
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/bash
-
-shift
-mono out "$@"
\ No newline at end of file
diff --git a/packages/mono/6.12.0/test.cs b/packages/mono/6.12.0/test.cs
deleted file mode 100644
index e91a2a2..0000000
--- a/packages/mono/6.12.0/test.cs
+++ /dev/null
@@ -1,9 +0,0 @@
-using System;
-
-public class Test
-{
-    public static void Main(string[] args)
-    {
-        Console.WriteLine("OK");
-    }
-}
\ No newline at end of file
diff --git a/packages/mono/6.12.0/test.vb b/packages/mono/6.12.0/test.vb
deleted file mode 100644
index 291042e..0000000
--- a/packages/mono/6.12.0/test.vb
+++ /dev/null
@@ -1,9 +0,0 @@
-Imports System
-
-Module Module1
-
-    Sub Main()
-        Console.WriteLine("OK")
-    End Sub
-
-End Module
diff --git a/runtimes/default.nix b/runtimes/default.nix
index 1669be2..4624670 100644
--- a/runtimes/default.nix
+++ b/runtimes/default.nix
@@ -62,4 +62,5 @@ args: {
     "node-coffeescript" = import ./node-coffeescript.nix args;
     "jvm-scala" = import ./jvm-scala.nix args;
     "llvm_ir" = import ./llvm_ir.nix args;
+    "mono-basic" = import ./mono-basic.nix args;
 }
diff --git a/runtimes/mono-basic.nix b/runtimes/mono-basic.nix
new file mode 100644
index 0000000..ecafd3c
--- /dev/null
+++ b/runtimes/mono-basic.nix
@@ -0,0 +1,47 @@
+{pkgs, piston, ...}:
+let
+    pkg = pkgs.mono;
+in piston.mkRuntime {
+    language = "basic";
+    version = pkg.version;
+    runtime = "mono";
+
+    aliases = [
+        "vb"
+        "mono-vb"
+        "mono-basic"
+        "visual-basic"
+    ];
+
+    compile = ''
+        rename 's/$/\.vb/' "$@" # Add .vb extension
+        ${pkg}/bin/vbc -out:out -sdkpath:${pkg}/lib/mono/4.8-api *.vb
+    '';
+
+    run = ''
+        shift
+        ${pkg}/bin/mono out.exe "$@"
+    '';
+
+    tests = [
+        (piston.mkTest {
+            files = {
+                "test.vb" = ''
+                    Imports System
+
+                    Module Module1
+
+                        Sub Main()
+                            Console.WriteLine("OK")
+                        End Sub
+
+                    End Module
+                '';
+            };
+            args = [];
+            stdin = "";
+            packages = [];
+            main = "test.vb";
+        })
+    ];
+}
\ No newline at end of file