diff --git a/pkgs/tools/system/minijail/default.nix b/pkgs/tools/system/minijail/default.nix
index bf2c6adf76a4..73f8cad580a5 100644
--- a/pkgs/tools/system/minijail/default.nix
+++ b/pkgs/tools/system/minijail/default.nix
@@ -1,13 +1,4 @@
-{ stdenv, lib, fetchFromGitiles, glibc, libcap, qemu }:
-
-let
-  dumpConstants =
-    if stdenv.buildPlatform == stdenv.hostPlatform then "./dump_constants"
-    else if stdenv.hostPlatform.isAarch32 then "qemu-arm dump_constants"
-    else if stdenv.hostPlatform.isAarch64 then "qemu-aarch64 dump_constants"
-    else if stdenv.hostPlatform.isx86_64 then "qemu-x86_64 dump_constants"
-    else throw "Unsupported host platform";
-in
+{ stdenv, lib, fetchFromGitiles, libcap }:
 
 stdenv.mkDerivation rec {
   pname = "minijail";
@@ -19,24 +10,15 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-OpwzISZ5iZNQvJAX7UJJ4gELEaVfcQgY9cqMM0YvBzc=";
   };
 
-  nativeBuildInputs =
-    lib.optional (stdenv.buildPlatform != stdenv.hostPlatform) qemu;
   buildInputs = [ libcap ];
 
   makeFlags = [ "ECHO=echo" "LIBDIR=$(out)/lib" ];
-  dumpConstantsFlags = lib.optional (stdenv.hostPlatform.libc == "glibc")
-    "LDFLAGS=-L${glibc.static}/lib";
 
   postPatch = ''
     substituteInPlace Makefile --replace /bin/echo echo
     patchShebangs platform2_preinstall.sh
   '';
 
-  postBuild = ''
-    make $makeFlags $buildFlags $dumpConstantsFlags dump_constants
-    ${dumpConstants} > constants.json
-  '';
-
   installPhase = ''
     ./platform2_preinstall.sh ${version} $out/include/chromeos
 
@@ -47,7 +29,6 @@ stdenv.mkDerivation rec {
     cp -v *.pc $out/lib/pkgconfig
     cp -v libminijail.h scoped_minijail.h $out/include/chromeos
     cp -v minijail0 $out/bin
-    cp -v constants.json $out/share/minijail
   '';
 
   enableParallelBuilding = true;
diff --git a/pkgs/tools/system/minijail/tools.nix b/pkgs/tools/system/minijail/tools.nix
index 875ea0dbff95..caaba84c0833 100644
--- a/pkgs/tools/system/minijail/tools.nix
+++ b/pkgs/tools/system/minijail/tools.nix
@@ -1,9 +1,36 @@
-{ buildPythonApplication, lib, minijail }:
+{ lib, stdenv, buildPythonApplication, pkgsBuildTarget, python, minijail }:
+
+let
+  targetClang = pkgsBuildTarget.targetPackages.clangStdenv.cc;
+in
 
 buildPythonApplication {
   pname = "minijail-tools";
   inherit (minijail) version src;
 
+  postPatch = ''
+    substituteInPlace Makefile --replace /bin/echo echo
+  '';
+
+  postConfigure = ''
+    substituteInPlace tools/compile_seccomp_policy.py \
+        --replace "'constants.json'" "'$out/share/constants.json'"
+  '';
+
+  preBuild = ''
+    make libconstants.gen.c libsyscalls.gen.c
+    ${targetClang}/bin/${targetClang.targetPrefix}cc -S -emit-llvm \
+        libconstants.gen.c libsyscalls.gen.c
+    ${python.pythonForBuild.interpreter} tools/generate_constants_json.py \
+        --output constants.json \
+        libconstants.gen.ll libsyscalls.gen.ll
+  '';
+
+  postInstall = ''
+    mkdir -p $out/share
+    cp -v constants.json $out/share/constants.json
+  '';
+
   meta = with lib; {
     homepage = "https://android.googlesource.com/platform/external/minijail/+/refs/heads/master/tools/";
     description = "A set of tools for minijail";