diff --git a/ci/Jenkinsfile.android b/ci/Jenkinsfile.android
index 7421bed8d9..235d524614 100644
--- a/ci/Jenkinsfile.android
+++ b/ci/Jenkinsfile.android
@@ -31,7 +31,7 @@ pipeline {
   }
 
   environment {
-    BUILD_PLATFORM = 'android'
+    TARGET_PLATFORM = 'android'
     LANG     = 'en_US.UTF-8'
     LANGUAGE = 'en_US.UTF-8'
     LC_ALL   = 'en_US.UTF-8'
diff --git a/ci/Jenkinsfile.ios b/ci/Jenkinsfile.ios
index 5911cd9346..25a013a7ac 100644
--- a/ci/Jenkinsfile.ios
+++ b/ci/Jenkinsfile.ios
@@ -22,7 +22,7 @@ pipeline {
   }
 
   environment {
-    BUILD_PLATFORM = 'ios'
+    TARGET_PLATFORM = 'ios'
     LANG = 'en_US.UTF-8'
     LANGUAGE = 'en_US.UTF-8'
     LC_ALL = 'en_US.UTF-8'
diff --git a/ci/Jenkinsfile.linux b/ci/Jenkinsfile.linux
index 64ce66d7ce..98d81f2265 100644
--- a/ci/Jenkinsfile.linux
+++ b/ci/Jenkinsfile.linux
@@ -37,7 +37,7 @@ pipeline {
    * https://issues.jenkins-ci.org/browse/JENKINS-49076
    **/
   environment {
-    BUILD_PLATFORM = 'linux'
+    TARGET_PLATFORM = 'linux'
     LANG = 'en_US.UTF-8'
     LANGUAGE = 'en_US.UTF-8'
     LC_ALL = 'en_US.UTF-8'
diff --git a/ci/Jenkinsfile.macos b/ci/Jenkinsfile.macos
index 11216a03a4..e13fa079a2 100644
--- a/ci/Jenkinsfile.macos
+++ b/ci/Jenkinsfile.macos
@@ -22,7 +22,7 @@ pipeline {
   }
 
   environment {
-    BUILD_PLATFORM = 'macos'
+    TARGET_PLATFORM = 'macos'
     LANG = 'en_US.UTF-8'
     LANGUAGE = 'en_US.UTF-8'
     LC_ALL = 'en_US.UTF-8'
diff --git a/ci/Jenkinsfile.windows b/ci/Jenkinsfile.windows
index 2fd1c29c8a..b475e28a82 100644
--- a/ci/Jenkinsfile.windows
+++ b/ci/Jenkinsfile.windows
@@ -35,7 +35,7 @@ pipeline {
    * https://issues.jenkins-ci.org/browse/JENKINS-49076
    **/
   environment {
-    BUILD_PLATFORM = 'windows'
+    TARGET_PLATFORM = 'windows'
     LANG = 'en_US.UTF-8'
     LANGUAGE = 'en_US.UTF-8'
     LC_ALL = 'en_US.UTF-8'
diff --git a/default.nix b/default.nix
index 007ae14f5e..73c4fca763 100644
--- a/default.nix
+++ b/default.nix
@@ -1,16 +1,28 @@
-let
-  pkgs = import ((import <nixpkgs> { }).fetchFromGitHub {
+# target-os = [ 'windows' 'linux' 'macos' 'android' 'ios' ]
+{ pkgs ? import ((import <nixpkgs> { }).fetchFromGitHub {
     owner = "status-im";
     repo = "nixpkgs";
     rev = "15623aac6e8cbfa24d4268195bc8eda7303ea2ff";
     sha256 = "0crjmspk65rbpkl3kqcj7433355i9fy530lhc48g2cz75xjk4sxh";
-  }) { config = { }; };
+  }) { config = { }; },
+  target-os ? "" }:
 
-in with pkgs;
+with pkgs;
   let
+    targetDesktop = {
+      "linux" = true;
+      "windows" = true;
+      "macos" = true;
+      "" = true;
+    }.${target-os} or false;
+    targetMobile = {
+      "android" = true;
+      "ios" = true;
+      "" = true;
+    }.${target-os} or false;
     _stdenv = stdenvNoCC; # TODO: Try to use stdenv for Darwin
-    statusDesktop = callPackage ./scripts/lib/setup/nix/desktop { stdenv = _stdenv; };
-    statusMobile = callPackage ./scripts/lib/setup/nix/mobile { stdenv = _stdenv; };
+    statusDesktop = callPackage ./scripts/lib/setup/nix/desktop { inherit target-os; stdenv = _stdenv; };
+    statusMobile = callPackage ./scripts/lib/setup/nix/mobile { inherit target-os; stdenv = _stdenv; };
     nodeInputs = import ./scripts/lib/setup/nix/global-node-packages/output {
       # The remaining dependencies come from Nixpkgs
       inherit pkgs;
@@ -36,18 +48,20 @@ in with pkgs;
       maven
       ncurses
       ps # used in scripts/start-react-native.sh
-      statusDesktop.buildInputs
-      statusMobile.buildInputs
       watchman
       unzip
       wget
     ] ++ nodePkgs
       ++ lib.optional isDarwin cocoapods
-      ++ lib.optional isLinux gcc7;
-    shellHook = ''
-        ${statusDesktop.shellHook}
-        ${statusMobile.shellHook}
-
-        [ -d "$ANDROID_SDK_ROOT" ] || ./scripts/setup # we assume that if the Android SDK dir does not exist, make setup needs to be run
-    '';
+      ++ lib.optional isLinux gcc7
+      ++ lib.optional targetDesktop statusDesktop.buildInputs
+      ++ lib.optional targetMobile statusMobile.buildInputs;
+    shellHook =
+      lib.optionalString targetDesktop statusDesktop.shellHook +
+      lib.optionalString targetMobile statusMobile.shellHook +
+      ''
+        if [ -n "$ANDROID_SDK_ROOT" ] && [ ! -d "$ANDROID_SDK_ROOT" ]; then
+          ./scripts/setup # we assume that if the Android SDK dir does not exist, make setup needs to be run
+        fi
+      '';
   }
diff --git a/scripts/lib/setup/installers.sh b/scripts/lib/setup/installers.sh
index a61f978650..d6a36f48fe 100755
--- a/scripts/lib/setup/installers.sh
+++ b/scripts/lib/setup/installers.sh
@@ -39,6 +39,10 @@ function install_nix() {
 }
 
 function install_android_sdk() {
+  if [ -z "$ANDROID_SDK_ROOT" ]; then
+    return 0
+  fi
+
   if [ -d "$ANDROID_SDK_ROOT" ]; then
     cecho "@green[[Android SDK already installed.]]"
   else
diff --git a/scripts/lib/setup/nix/desktop/default.nix b/scripts/lib/setup/nix/desktop/default.nix
index 7d344f5ae2..01e7075ebe 100644
--- a/scripts/lib/setup/nix/desktop/default.nix
+++ b/scripts/lib/setup/nix/desktop/default.nix
@@ -1,9 +1,17 @@
-{ stdenv, pkgs }:
+{ stdenv, pkgs, target-os }:
 
 with pkgs;
 with stdenv; 
 
 let
+  targetLinux = {
+    "linux" = true;
+    "" = true;
+  }.${target-os} or false;
+  targetWindows = {
+    "windows" = true;
+    "" = true;
+  }.${target-os} or false;
   windowsPlatform = callPackage ./windows { };
   appimagekit = callPackage ./appimagekit { };
   linuxdeployqt = callPackage ./linuxdeployqt { inherit appimagekit; };
@@ -16,11 +24,13 @@ in
       file
       gnupg # Used by appimagetool
       go
-      qt5.full
-    ] ++ lib.optional isLinux [ appimagekit linuxdeployqt patchelf ]
-      ++ lib.optional isLinux windowsPlatform.buildInputs;
-    shellHook = ''
+    ] ++ lib.optional targetLinux [ appimagekit linuxdeployqt patchelf ]
+      ++ lib.optional (! targetWindows) qt5.full
+      ++ lib.optional targetWindows windowsPlatform.buildInputs;
+    shellHook = (if target-os == "windows" then "unset QT_PATH" else ''
       export QT_PATH="${qt5.full}"
       export PATH="${stdenv.lib.makeBinPath [ qt5.full ]}:$PATH"
-    '';
+    '') + (lib.optionalString isDarwin ''
+      export MACOSX_DEPLOYMENT_TARGET=10.9
+    '');
   }
diff --git a/scripts/lib/setup/nix/mobile/default.nix b/scripts/lib/setup/nix/mobile/default.nix
index 82e0569ee9..17754d0591 100644
--- a/scripts/lib/setup/nix/mobile/default.nix
+++ b/scripts/lib/setup/nix/mobile/default.nix
@@ -1,18 +1,22 @@
-{ stdenv, pkgs }:
+{ stdenv, pkgs, target-os ? "" }:
 
 with pkgs;
 with stdenv; 
 
 let
   android-ndk = callPackage ./android-ndk { };
+  targetAndroid = {
+    "android" = true;
+    "" = true;
+  }.${target-os} or false;
 
 in
   {
-    buildInputs = [
+    buildInputs = lib.optional targetAndroid [
       android-ndk
       openjdk
     ];
-    shellHook = ''
+    shellHook = lib.optionalString targetAndroid ''
       export JAVA_HOME="${openjdk}"
       export ANDROID_HOME=~/.status/Android/Sdk
       export ANDROID_SDK_ROOT="$ANDROID_HOME"