diff --git a/pkgs/development/tools/knightos/patchrom/default.nix b/pkgs/development/tools/knightos/patchrom/default.nix
new file mode 100644
index 000000000000..ed34053d8354
--- /dev/null
+++ b/pkgs/development/tools/knightos/patchrom/default.nix
@@ -0,0 +1,28 @@
+{ stdenv, fetchFromGitHub, cmake, asciidoc, libxslt, docbook_xsl }:
+
+
+stdenv.mkDerivation rec {
+  pname = "patchrom";
+
+  version = "1.1.3";
+
+  src = fetchFromGitHub {
+    owner = "KnightOS";
+    repo = "patchrom";
+    rev = version;
+    sha256 = "0yc4q7n3k7k6rx3cxq5ddd5r0la8gw1287a74kql6gwkxjq0jmcv";
+  };
+
+  nativeBuildInputs = [ cmake asciidoc docbook_xsl ];
+
+  buildInputs = [ libxslt ];
+
+  hardeningDisable = [ "format" ];
+
+  meta = with stdenv.lib; {
+    homepage    = "https://knightos.org/";
+    description = "Patches jumptables into TI calculator ROM files and generates an include file";
+    license     = licenses.mit;
+    maintainers = with maintainers; [ siraben ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index db9bb95047be..0c050e7a3ea2 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9336,6 +9336,8 @@ in
     asciidoc = asciidoc-full;
   };
 
+  knightos-patchrom = callPackage ../development/tools/knightos/patchrom { };
+
   knightos-scas = callPackage ../development/tools/knightos/scas { };
 
   kotlin = callPackage ../development/compilers/kotlin { };