diff --git a/pkgs/by-name/64/64tass/package.nix b/pkgs/by-name/64/64tass/package.nix
new file mode 100644
index 000000000000..9179e41cfa65
--- /dev/null
+++ b/pkgs/by-name/64/64tass/package.nix
@@ -0,0 +1,30 @@
+{
+  lib,
+  stdenv,
+  fetchzip,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "64tass";
+  version = "1.60.3243";
+
+  src = fetchzip {
+    url = "mirror://sourceforge/tass64/64tass-${finalAttrs.version}-src.zip";
+    hash = "sha256-73/MoQqqM966xtN4D8F85HZSw/gEpcFQ2JiH3k6vI+4=";
+  };
+
+  installFlags = [ "prefix=$(out)" ];
+
+  meta = {
+    homepage = "https://tass64.sourceforge.net/";
+    description = "Multi pass optimizing macro assembler for the 65xx series of processors";
+    license = [
+      lib.licenses.gpl2Plus
+      lib.licenses.lgpl2Only
+      lib.licenses.lgpl21Only
+      lib.licenses.mit
+    ];
+    maintainers = [ lib.maintainers.matthewcroughan ];
+    platforms = lib.platforms.linux;
+  };
+})