diff --git a/pkgs/development/tools/knightos/regenkfs/default.nix b/pkgs/development/tools/knightos/regenkfs/default.nix
new file mode 100644
index 000000000000..1e8b992dfe09
--- /dev/null
+++ b/pkgs/development/tools/knightos/regenkfs/default.nix
@@ -0,0 +1,23 @@
+{ lib, fetchFromGitHub, rustPlatform }:
+
+rustPlatform.buildRustPackage {
+  pname = "regenkfs";
+  version = "unstable-2020-10-17";
+
+  src = fetchFromGitHub {
+    owner = "siraben";
+    repo = "regenkfs";
+    rev = "652155445fc39bbe6628f6b9415b5cd6863f592f";
+    sha256 = "sha256-zkwOpMNPGstn/y1l1s8blUKpBebY4Ta9hiPYxVLvG6Y=";
+  };
+
+  cargoSha256 = "sha256-05VmQdop4vdzw2XEvVdp9+RNmyZvay1Q7gKN2n8rDEQ=";
+  cargoBuildFlags = [ "--features=c-undef" ];
+
+  meta = with lib; {
+    description = "Reimplementation of genkfs in Rust";
+    homepage = "https://github.com/siraben/regenkfs";
+    license = licenses.mit;
+    maintainers = with maintainers; [ siraben ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ed1329180b20..b00ec0ddaf41 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -11615,6 +11615,8 @@ in
 
   knightos-genkfs = callPackage ../development/tools/knightos/genkfs { };
 
+  regenkfs = callPackage ../development/tools/knightos/regenkfs { };
+
   knightos-kcc = callPackage ../development/tools/knightos/kcc { };
 
   knightos-kimg = callPackage ../development/tools/knightos/kimg { };