diff --git a/pkgs/development/interpreters/spidermonkey/1.8.5.nix b/pkgs/development/interpreters/spidermonkey/1.8.5.nix
deleted file mode 100644
index 4892e0b8abef..000000000000
--- a/pkgs/development/interpreters/spidermonkey/1.8.5.nix
+++ /dev/null
@@ -1,79 +0,0 @@
-{ stdenv, lib, autoconf213, fetchurl, fetchpatch, pkg-config, nspr, perl, python2, zip }:
-
-stdenv.mkDerivation {
-  pname = "spidermonkey";
-  version = "1.8.5";
-
-  src = fetchurl {
-    url = "mirror://mozilla/js/js185-1.0.0.tar.gz";
-    sha256 = "5d12f7e1f5b4a99436685d97b9b7b75f094d33580227aa998c406bbae6f2a687";
-  };
-
-  propagatedBuildInputs = [ nspr ];
-
-  nativeBuildInputs = [ pkg-config ] ++ lib.optional stdenv.isAarch32 autoconf213;
-  buildInputs = [ perl python2 zip ];
-
-  postUnpack = "sourceRoot=\${sourceRoot}/js/src";
-
-  preConfigure = ''
-    export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -I${nspr.dev}/include/nspr"
-    export LIBXUL_DIST=$out
-    ${lib.optionalString stdenv.isAarch32 "autoreconf --verbose --force"}
-  '';
-
-  patches = [
-    (fetchpatch {
-      name = "gcc6.patch";
-      url = "https://sources.debian.org/data/main/m/mozjs/1.8.5-1.0.0+dfsg-6/debian/patches/fix-811665.patch";
-      sha256 = "1q8477xqxiy5d8376k5902l45gd0qkd4nxmhl8vr6rr1pxfcny99";
-    })
-  ] ++ lib.optionals stdenv.isAarch32 [
-    # Explained below in configureFlags for ARM
-    ./1.8.5-findvanilla.patch
-    # Fix for hard float flags.
-    ./1.8.5-arm-flags.patch
-  ];
-
-  patchFlags = [ "-p3" ];
-
-  # fixes build on gcc8
-  postPatch = ''
-    substituteInPlace ./methodjit/MethodJIT.cpp \
-      --replace 'asm volatile' 'asm'
-  '';
-
-  # On the Sheevaplug, ARM, its nanojit thing segfaults in japi-tests in
-  # "make check". Disabling tracejit makes it work, but then it needs the
-  # patch findvanilla.patch do disable a checker about allocator safety. In case
-  # of polkit, which is what matters most, it does not override the allocator
-  # so the failure of that test does not matter much.
-  configureFlags = [ "--enable-threadsafe" "--with-system-nspr" ] ++
-    lib.optionals (stdenv.hostPlatform.system == "armv5tel-linux") [
-        "--with-cpu-arch=armv5t"
-        "--disable-tracejit" ];
-
-  # hack around a make problem, see https://github.com/NixOS/nixpkgs/issues/1279#issuecomment-29547393
-  preBuild = ''
-    touch -- {.,shell,jsapi-tests}/{-lpthread,-ldl}
-    ${if stdenv.isAarch32 then "rm -r jit-test/tests/jaeger/bug563000" else ""}
-  '';
-
-  enableParallelBuilding = true;
-
-  doCheck = true;
-
-  preCheck = ''
-    rm jit-test/tests/sunspider/check-date-format-tofte.js    # https://bugzil.la/600522
-  '';
-
-  meta = with lib; {
-    description = "Mozilla's JavaScript engine written in C/C++";
-    homepage = "https://developer.mozilla.org/en/SpiderMonkey";
-    # TODO: MPL/GPL/LGPL tri-license.
-    maintainers = [ maintainers.goibhniu ];
-    platforms = platforms.linux;
-    broken = stdenv.isAarch64; # 2018-08-21, broken since 2017-03-08
-  };
-}
-
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 3d10ed004cbc..7ba7838a986a 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -745,6 +745,7 @@ mapAliases ({
   speedtest_cli = speedtest-cli;  # added 2015-02-17
   spice_gtk = spice-gtk; # added 2018-02-25
   spice_protocol = spice-protocol; # added 2018-02-25
+  spidermonkey_1_8_5 = throw "spidermonkey_1_8_5 has been removed, because it is based on Firefox 4.0 from 2011."; # added 2021-05-03
   spidermonkey_38 = throw "spidermonkey_38 has been removed. Please use spidermonkey_78 instead."; # added 2021-03-21
   spidermonkey_52 = throw "spidermonkey_52 has been removed. Please use spidermonkey_78 instead."; # added 2019-10-16
   spidermonkey_60 = throw "spidermonkey_60 has been removed. Please use spidermonkey_78 instead."; # added 2021-03-21
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e8c23f6d0272..7ce3ccd4019c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -12185,7 +12185,6 @@ in
 
   sparkleshare = callPackage ../applications/version-management/sparkleshare { };
 
-  spidermonkey_1_8_5 = callPackage ../development/interpreters/spidermonkey/1.8.5.nix { };
   spidermonkey_68 = callPackage ../development/interpreters/spidermonkey/68.nix { };
   spidermonkey_78 = callPackage ../development/interpreters/spidermonkey/78.nix { };