forth nix package

runtimes/default.nix

@@ -64,4 +64,5 @@ args: {
     "llvm_ir" = import ./llvm_ir.nix args;
     "mono-basic" = import ./mono-basic.nix args;
     "j" = import ./j.nix args;
+    "forth" = import ./forth.nix args;
 }

runtimes/forth.nix

@@ -0,0 +1,30 @@
+{pkgs, piston, ...}:
+let
+    pkg = pkgs.gforth;
+in piston.mkRuntime {
+    language = "forth";
+    version = pkg.version;
+    runtime = "forth";
+
+    aliases = [
+        "gforth"
+    ];
+
+    run = ''
+    ${pkg}/bin/gforth "$@"
+    '';
+
+    tests = [
+        (piston.mkTest {
+            files = {
+                "test.forth" = ''
+                .( OK) bye
+                '';
+            };
+            args = [];
+            stdin = "";
+            packages = [];
+            main = "test.forth";
+        })
+    ];
+}