diff --git a/pkgs/applications/networking/browsers/chromium/browser.nix b/pkgs/applications/networking/browsers/chromium/browser.nix
index 3b45ff78206c..8c83dbb853a6 100644
--- a/pkgs/applications/networking/browsers/chromium/browser.nix
+++ b/pkgs/applications/networking/browsers/chromium/browser.nix
@@ -1,201 +1,24 @@
-{ stdenv, fetchurl, ninja, which
-
-# default dependencies
-, bzip2, flac, speex, icu, libopus
-, libevent, expat, libjpeg, snappy
-, libpng, libxml2, libxslt, v8
-, xdg_utils, yasm, minizip, libwebp
-, libusb1, libexif, pciutils
-
-, python, pythonPackages, perl, pkgconfig
-, nspr, udev, krb5
-, utillinux, alsaLib
-, gcc, bison, gperf
-, glib, gtk, dbus_glib
-, libXScrnSaver, libXcursor, libXtst, mesa
-, protobuf, speechd, libXdamage
-
-# optional dependencies
-, libgcrypt ? null # gnomeSupport || cupsSupport
-
-# package customization
-, enableSELinux ? false, libselinux ? null
-, enableNaCl ? false
-, useOpenSSL ? false, nss ? null, openssl ? null
-, gnomeSupport ? false, gnome ? null
-, gnomeKeyringSupport ? false, libgnome_keyring3 ? null
-, proprietaryCodecs ? true
-, cupsSupport ? false
-, pulseSupport ? false, pulseaudio ? null
-
-, source
-, plugins
-}:
+{ stdenv, mkChromiumDerivation }:
 
 with stdenv.lib;
 
-let
-
-  mkGypFlags =
-    let
-      sanitize = value:
-        if value == true then "1"
-        else if value == false then "0"
-        else "${value}";
-      toFlag = key: value: "-D${key}=${sanitize value}";
-    in attrs: concatStringsSep " " (attrValues (mapAttrs toFlag attrs));
-
-  gypFlagsUseSystemLibs = {
-    use_system_bzip2 = true;
-    use_system_flac = true;
-    use_system_libevent = true;
-    use_system_libexpat = true;
-    use_system_libexif = true;
-    use_system_libjpeg = true;
-    use_system_libpng = true;
-    use_system_libwebp = true;
-    use_system_libxml = true;
-    use_system_opus = true;
-    use_system_snappy = true;
-    use_system_speex = true;
-    use_system_ssl = useOpenSSL;
-    use_system_stlport = true;
-    use_system_xdg_utils = true;
-    use_system_yasm = true;
-    use_system_zlib = true;
-    use_system_protobuf = true;
-
-    use_system_harfbuzz = false;
-    use_system_icu = false; # Doesn't support ICU 52 yet.
-    use_system_libusb = false; # http://crbug.com/266149
-    use_system_skia = false;
-    use_system_sqlite = false; # http://crbug.com/22208
-    use_system_v8 = !versionOlder source.version "34.0.0.0";
-  };
-
-  defaultDependencies = [
-    bzip2 flac speex icu libopus
-    libevent expat libjpeg snappy
-    libpng libxml2 libxslt v8
-    xdg_utils yasm minizip libwebp
-    libusb1 libexif
-  ];
-
-  # build paths and release info
-  packageName = "chromium";
-  buildType = "Release";
-  buildPath = "out/${buildType}";
-  libExecPath = "$out/libexec/${packageName}";
-
-in stdenv.mkDerivation rec {
-  name = "${packageName}-browser-${version}";
-  inherit (source) version;
-  inherit packageName;
-  src = source;
-
-  buildInputs = defaultDependencies ++ [
-    which
-    python perl pkgconfig
-    nspr udev
-    (if useOpenSSL then openssl else nss)
-    utillinux alsaLib
-    gcc bison gperf
-    gcc bison gperf krb5
-    glib gtk dbus_glib
-    libXScrnSaver libXcursor libXtst mesa
-    pciutils protobuf speechd libXdamage
-    pythonPackages.gyp
-  ] ++ optional gnomeKeyringSupport libgnome_keyring3
-    ++ optionals gnomeSupport [ gnome.GConf libgcrypt ]
-    ++ optional enableSELinux libselinux
-    ++ optional cupsSupport libgcrypt
-    ++ optional pulseSupport pulseaudio;
-
-  # XXX: Wait for https://crbug.com/239107 and https://crbug.com/239181 to
-  #      be fixed, then try again to unbundle everything into separate
-  #      derivations.
-  prePatch = ''
-    cp -dsr --no-preserve=mode "${source.main}"/* .
-    cp -dsr --no-preserve=mode "${source.sandbox}" sandbox
-    cp -dr "${source.bundled}" third_party
-    chmod -R u+w third_party
-
-    # Hardcode source tree root in all gyp files
-    find -iname '*.gyp*' \( -type f -o -type l \) \
-      -exec sed -i -e 's|<(DEPTH)|'"$(pwd)"'|g' {} + \
-      -exec chmod u+w {} +
-  '';
-
-  postPatch = ''
-    sed -i -e '/base::FilePath exe_dir/,/^ *} *$/c \
-      sandbox_binary = base::FilePath(getenv("CHROMIUM_SANDBOX_BINARY_PATH"));
-    ' content/browser/browser_main_loop.cc
-  '';
-
-  gypFlags = mkGypFlags (gypFlagsUseSystemLibs // {
-    linux_use_gold_binary = false;
-    linux_use_gold_flags = false;
-    proprietary_codecs = false;
-    use_gnome_keyring = gnomeKeyringSupport;
-    use_gconf = gnomeSupport;
-    use_gio = gnomeSupport;
-    use_pulseaudio = pulseSupport;
-    disable_nacl = !enableNaCl;
-    use_openssl = useOpenSSL;
-    selinux = enableSELinux;
-    use_cups = cupsSupport;
-    linux_sandbox_chrome_path="${libExecPath}/${packageName}";
-    werror = "";
-
-    # Google API keys, see http://www.chromium.org/developers/how-tos/api-keys.
-    # Note: These are for NixOS/nixpkgs use ONLY. For your own distribution,
-    # please get your own set of keys.
-    google_api_key = "AIzaSyDGi15Zwl11UNe6Y-5XW_upsfyw31qwZPI";
-    google_default_client_id = "404761575300.apps.googleusercontent.com";
-    google_default_client_secret = "9rIFQjfnkykEmqb6FfjJQD1D";
-
-  } // optionalAttrs proprietaryCodecs {
-    # enable support for the H.264 codec
-    proprietary_codecs = true;
-    ffmpeg_branding = "Chrome";
-  } // optionalAttrs (stdenv.system == "x86_64-linux") {
-    target_arch = "x64";
-    python_arch = "x86-64";
-  } // optionalAttrs (stdenv.system == "i686-linux") {
-    target_arch = "ia32";
-    python_arch = "ia32";
-  });
-
-  configurePhase = ''
-    python build/linux/unbundle/replace_gyp_files.py ${gypFlags}
-    python build/gyp_chromium -f ninja --depth "$(pwd)" ${gypFlags}
-  '';
-
-  buildPhase = let
-    CC = "${gcc}/bin/gcc";
-    CXX = "${gcc}/bin/g++";
-  in ''
-    CC="${CC}" CC_host="${CC}"     \
-    CXX="${CXX}" CXX_host="${CXX}" \
-    LINK_host="${CXX}"             \
-      "${ninja}/bin/ninja" -C "${buildPath}"  \
-        -j$NIX_BUILD_CORES -l$NIX_BUILD_CORES \
-        chrome
-  '';
+mkChromiumDerivation (base: rec {
+  name = "chromium-browser";
+  buildTargets = [ "chrome" ];
 
   installPhase = ''
-    ensureDir "${libExecPath}"
-    cp -v "${buildPath}/"*.pak "${libExecPath}/"
-    ${optionalString (!versionOlder version "34.0.0.0") ''
-    cp -v "${buildPath}/icudtl.dat" "${libExecPath}/"
+    ensureDir "$libExecPath"
+    cp -v "$buildPath/"*.pak "$libExecPath/"
+    ${optionalString (!versionOlder base.version "34.0.0.0") ''
+    cp -v "$buildPath/icudtl.dat" "$libExecPath/"
     ''}
-    cp -vR "${buildPath}/locales" "${buildPath}/resources" "${libExecPath}/"
-    cp -v ${buildPath}/libffmpegsumo.so "${libExecPath}/"
+    cp -vR "$buildPath/locales" "$buildPath/resources" "$libExecPath/"
+    cp -v $buildPath/libffmpegsumo.so "$libExecPath/"
 
-    cp -v "${buildPath}/chrome" "${libExecPath}/${packageName}"
+    cp -v "$buildPath/chrome" "$libExecPath/$packageName"
 
     mkdir -vp "$out/share/man/man1"
-    cp -v "${buildPath}/chrome.1" "$out/share/man/man1/${packageName}.1"
+    cp -v "$buildPath/chrome.1" "$out/share/man/man1/$packageName.1"
 
     for icon_file in chrome/app/theme/chromium/product_logo_*[0-9].png; do
       num_and_suffix="''${icon_file##*logo_}"
@@ -204,7 +27,7 @@ in stdenv.mkDerivation rec {
       logo_output_prefix="$out/share/icons/hicolor"
       logo_output_path="$logo_output_prefix/''${icon_size}x''${icon_size}/apps"
       mkdir -vp "$logo_output_path"
-      cp -v "$icon_file" "$logo_output_path/${packageName}.png"
+      cp -v "$icon_file" "$logo_output_path/$packageName.png"
     done
   '';
 
@@ -215,4 +38,4 @@ in stdenv.mkDerivation rec {
     license = licenses.bsd3;
     platforms = platforms.linux;
   };
-}
+})
diff --git a/pkgs/applications/networking/browsers/chromium/common.nix b/pkgs/applications/networking/browsers/chromium/common.nix
new file mode 100644
index 000000000000..be1725345e79
--- /dev/null
+++ b/pkgs/applications/networking/browsers/chromium/common.nix
@@ -0,0 +1,200 @@
+{ stdenv, fetchurl, ninja, which
+
+# default dependencies
+, bzip2, flac, speex, icu, libopus
+, libevent, expat, libjpeg, snappy
+, libpng, libxml2, libxslt, v8
+, xdg_utils, yasm, minizip, libwebp
+, libusb1, libexif, pciutils
+
+, python, pythonPackages, perl, pkgconfig
+, nspr, udev, krb5
+, utillinux, alsaLib
+, gcc, bison, gperf
+, glib, gtk, dbus_glib
+, libXScrnSaver, libXcursor, libXtst, mesa
+, protobuf, speechd, libXdamage
+
+# optional dependencies
+, libgcrypt ? null # gnomeSupport || cupsSupport
+
+# package customization
+, enableSELinux ? false, libselinux ? null
+, enableNaCl ? false
+, useOpenSSL ? false, nss ? null, openssl ? null
+, gnomeSupport ? false, gnome ? null
+, gnomeKeyringSupport ? false, libgnome_keyring3 ? null
+, proprietaryCodecs ? true
+, cupsSupport ? false
+, pulseSupport ? false, pulseaudio ? null
+
+, source
+, plugins
+}:
+
+buildFun:
+
+with stdenv.lib;
+
+let
+  # The additional attributes for creating derivations based on the chromium
+  # source tree.
+  extraAttrs = buildFun base;
+
+  mkGypFlags =
+    let
+      sanitize = value:
+        if value == true then "1"
+        else if value == false then "0"
+        else "${value}";
+      toFlag = key: value: "-D${key}=${sanitize value}";
+    in attrs: concatStringsSep " " (attrValues (mapAttrs toFlag attrs));
+
+  gypFlagsUseSystemLibs = {
+    use_system_bzip2 = true;
+    use_system_flac = true;
+    use_system_libevent = true;
+    use_system_libexpat = true;
+    use_system_libexif = true;
+    use_system_libjpeg = true;
+    use_system_libpng = true;
+    use_system_libwebp = true;
+    use_system_libxml = true;
+    use_system_opus = true;
+    use_system_snappy = true;
+    use_system_speex = true;
+    use_system_ssl = useOpenSSL;
+    use_system_stlport = true;
+    use_system_xdg_utils = true;
+    use_system_yasm = true;
+    use_system_zlib = true;
+    use_system_protobuf = true;
+
+    use_system_harfbuzz = false;
+    use_system_icu = false; # Doesn't support ICU 52 yet.
+    use_system_libusb = false; # http://crbug.com/266149
+    use_system_skia = false;
+    use_system_sqlite = false; # http://crbug.com/22208
+    use_system_v8 = !versionOlder source.version "34.0.0.0";
+  };
+
+  opusWithCustomModes = libopus.override {
+    withCustomModes = !versionOlder source.version "35.0.0.0";
+  };
+
+  defaultDependencies = [
+    bzip2 flac speex icu opusWithCustomModes
+    libevent expat libjpeg snappy
+    libpng libxml2 libxslt v8
+    xdg_utils yasm minizip libwebp
+    libusb1 libexif
+  ];
+
+  # build paths and release info
+  packageName = extraAttrs.name;
+  buildType = "Release";
+  buildPath = "out/${buildType}";
+  libExecPath = "$out/libexec/${packageName}";
+
+  base = rec {
+    name = "${packageName}-${version}";
+    inherit (source) version;
+    inherit packageName buildType buildPath;
+    src = source;
+
+    buildInputs = defaultDependencies ++ [
+      which
+      python perl pkgconfig
+      nspr udev
+      (if useOpenSSL then openssl else nss)
+      utillinux alsaLib
+      gcc bison gperf krb5
+      glib gtk dbus_glib
+      libXScrnSaver libXcursor libXtst mesa
+      pciutils protobuf speechd libXdamage
+      pythonPackages.gyp
+    ] ++ optional gnomeKeyringSupport libgnome_keyring3
+      ++ optionals gnomeSupport [ gnome.GConf libgcrypt ]
+      ++ optional enableSELinux libselinux
+      ++ optional cupsSupport libgcrypt
+      ++ optional pulseSupport pulseaudio;
+
+    # XXX: Wait for https://crbug.com/239107 and https://crbug.com/239181 to
+    #      be fixed, then try again to unbundle everything into separate
+    #      derivations.
+    prePatch = ''
+      cp -dsr --no-preserve=mode "${source.main}"/* .
+      cp -dsr --no-preserve=mode "${source.sandbox}" sandbox
+      cp -dr "${source.bundled}" third_party
+      chmod -R u+w third_party
+
+      # Hardcode source tree root in all gyp files
+      find -iname '*.gyp*' \( -type f -o -type l \) \
+        -exec sed -i -e 's|<(DEPTH)|'"$(pwd)"'|g' {} + \
+        -exec chmod u+w {} +
+    '';
+
+    postPatch = ''
+      sed -i -e '/base::FilePath exe_dir/,/^ *} *$/c \
+        sandbox_binary = base::FilePath(getenv("CHROMIUM_SANDBOX_BINARY_PATH"));
+      ' content/browser/browser_main_loop.cc
+    '';
+
+    gypFlags = mkGypFlags (gypFlagsUseSystemLibs // {
+      linux_use_gold_binary = false;
+      linux_use_gold_flags = false;
+      proprietary_codecs = false;
+      use_gnome_keyring = gnomeKeyringSupport;
+      use_gconf = gnomeSupport;
+      use_gio = gnomeSupport;
+      use_pulseaudio = pulseSupport;
+      disable_nacl = !enableNaCl;
+      use_openssl = useOpenSSL;
+      selinux = enableSELinux;
+      use_cups = cupsSupport;
+      linux_sandbox_chrome_path="${libExecPath}/${packageName}";
+      werror = "";
+
+      # Google API keys, see http://www.chromium.org/developers/how-tos/api-keys.
+      # Note: These are for NixOS/nixpkgs use ONLY. For your own distribution,
+      # please get your own set of keys.
+      google_api_key = "AIzaSyDGi15Zwl11UNe6Y-5XW_upsfyw31qwZPI";
+      google_default_client_id = "404761575300.apps.googleusercontent.com";
+      google_default_client_secret = "9rIFQjfnkykEmqb6FfjJQD1D";
+
+    } // optionalAttrs proprietaryCodecs {
+      # enable support for the H.264 codec
+      proprietary_codecs = true;
+      ffmpeg_branding = "Chrome";
+    } // optionalAttrs (stdenv.system == "x86_64-linux") {
+      target_arch = "x64";
+      python_arch = "x86-64";
+    } // optionalAttrs (stdenv.system == "i686-linux") {
+      target_arch = "ia32";
+      python_arch = "ia32";
+    } // (extraAttrs.gypFlags or {}));
+
+    configurePhase = ''
+      # This is to ensure expansion of $out.
+      libExecPath="${libExecPath}"
+      python build/linux/unbundle/replace_gyp_files.py ${gypFlags}
+      python build/gyp_chromium -f ninja --depth "$(pwd)" ${gypFlags}
+    '';
+
+    buildPhase = let
+      CC = "${gcc}/bin/gcc";
+      CXX = "${gcc}/bin/g++";
+    in ''
+      CC="${CC}" CC_host="${CC}"     \
+      CXX="${CXX}" CXX_host="${CXX}" \
+      LINK_host="${CXX}"             \
+        "${ninja}/bin/ninja" -C "${buildPath}"  \
+          -j$NIX_BUILD_CORES -l$NIX_BUILD_CORES \
+          ${concatStringsSep " " (extraAttrs.buildTargets or [])}
+    '';
+  };
+
+# Remove some extraAttrs we supplied to the base attributes already.
+in stdenv.mkDerivation (base // removeAttrs extraAttrs [
+  "name" "gypFlags" "buildTargets"
+])
diff --git a/pkgs/applications/networking/browsers/chromium/default.nix b/pkgs/applications/networking/browsers/chromium/default.nix
index 950be9c1892b..0fd9e09accfd 100644
--- a/pkgs/applications/networking/browsers/chromium/default.nix
+++ b/pkgs/applications/networking/browsers/chromium/default.nix
@@ -24,12 +24,13 @@ let
       inherit useOpenSSL;
     };
 
-    browser = callPackage ./browser.nix {
+    mkChromiumDerivation = callPackage ./common.nix {
       inherit enableSELinux enableNaCl useOpenSSL gnomeSupport
               gnomeKeyringSupport proprietaryCodecs cupsSupport
               pulseSupport;
     };
 
+    browser = callPackage ./browser.nix { };
     sandbox = callPackage ./sandbox.nix { };
 
     plugins = callPackage ./plugins.nix {
@@ -54,4 +55,8 @@ in stdenv.mkDerivation {
   '';
 
   inherit (chromium.browser) meta packageName;
+
+  passthru = {
+    mkDerivation = chromium.mkChromiumDerivation;
+  };
 }