diff --git a/pkgs/development/interpreters/spidermonkey/68.nix b/pkgs/development/interpreters/spidermonkey/68.nix
new file mode 100644
index 000000000000..807a26a7b95b
--- /dev/null
+++ b/pkgs/development/interpreters/spidermonkey/68.nix
@@ -0,0 +1,95 @@
+{ stdenv, fetchurl, fetchpatch, autoconf213, pkgconfig, perl, python2, python3, zip, buildPackages
+, which, readline, zlib, icu, cargo, rustc, llvmPackages }:
+
+with stdenv.lib;
+
+let
+  python3Env = buildPackages.python3.withPackages (p: [p.six]);
+in stdenv.mkDerivation rec {
+  pname = "spidermonkey";
+  version = "68.4.2";
+
+  src = fetchurl {
+    url = "mirror://mozilla/firefox/releases/${version}esr/source/firefox-${version}esr.source.tar.xz";
+    sha256 = "1x1fglg1b85hb0srd6k7n5svl0nlgdm4njc8q13s2750v5ck4ljx";
+  };
+
+  outputs = [ "out" "dev" ];
+  setOutputFlags = false; # Configure script only understands --includedir
+
+  nativeBuildInputs = [
+    autoconf213
+    pkgconfig
+    perl
+    which
+    python2
+    zip
+    cargo
+    rustc
+    llvmPackages.llvm
+  ];
+
+  buildInputs = [
+    readline
+    zlib
+    icu
+  ];
+
+  preConfigure = ''
+    export CXXFLAGS="-fpermissive"
+    export LIBXUL_DIST=$out
+    export PYTHON3="${python3Env.interpreter}"
+
+    # We can't build in js/src/, so create a build dir
+    mkdir obj
+    cd obj/
+    configureScript=../js/src/configure
+  '';
+
+  configureFlags = [
+    # Reccommended by gjs upstream
+    "--disable-jemalloc"
+    "--enable-unaligned-private-values"
+    "--with-intl-api"
+    "--enable-posix-nspr-emulation"
+    "--with-system-zlib"
+    "--with-system-icu"
+
+    "--with-libclang-path=${llvmPackages.libclang}/lib"
+    "--with-clang-path=${llvmPackages.clang}/bin/clang"
+
+    "--enable-shared-js"
+    "--enable-readline"
+    # Fedora and Arch disable optimize, but it doesn't seme to be necessary
+    # It turns on -O3 which some gcc version had a problem with:
+    # https://src.fedoraproject.org/rpms/mozjs38/c/761399aba092bcb1299bb4fccfd60f370ab4216e
+    "--enable-optimize"
+    "--enable-release"
+  ] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
+    # Spidermonkey seems to use different host/build terminology for cross
+    # compilation here.
+    "--host=${stdenv.buildPlatform.config}"
+    "--target=${stdenv.hostPlatform.config}"
+  ];
+
+  configurePlatforms = [];
+
+  depsBuildBuild = [ buildPackages.stdenv.cc ];
+
+  # Remove unnecessary static lib
+  preFixup = ''
+    moveToOutput bin/js60-config "$dev"
+    rm $out/lib/libjs_static.ajs
+    ln -s $out/bin/js60 $out/bin/js
+  '';
+
+  enableParallelBuilding = true;
+
+  meta = with stdenv.lib; {
+    description = "Mozilla's JavaScript engine written in C/C++";
+    homepage = https://developer.mozilla.org/en/SpiderMonkey;
+    license = licenses.gpl2; # TODO: MPL/GPL/LGPL tri-license.
+    maintainers = [ maintainers.abbradar ];
+    platforms = platforms.linux;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index be9af7769463..3ce188bff417 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9726,6 +9726,7 @@ in
       stdenv = gcc6Stdenv; # with gcc-7: undefined reference to `__divmoddi4'
   }));
   spidermonkey_60 = callPackage ../development/interpreters/spidermonkey/60.nix { };
+  spidermonkey_68 = callPackage ../development/interpreters/spidermonkey/68.nix { };
   spidermonkey = spidermonkey_38;
 
   ssm-agent = callPackage ../applications/networking/cluster/ssm-agent { };