diff --git a/ci/utils.groovy b/ci/utils.groovy
index 3fbb019745..99963c7645 100644
--- a/ci/utils.groovy
+++ b/ci/utils.groovy
@@ -19,7 +19,7 @@ def nix_sh(cmd) {
   sh """
     . ~/.nix-profile/etc/profile.d/nix.sh && \\
       nix-shell \'${env.WORKSPACE}/default.nix\' --argstr target-os \'${env.TARGET_PLATFORM}\' \\
-      --run \'${cmd}\'
+        --run \'${cmd}\'
   """
 }
 
diff --git a/scripts/lib/setup/nix/mobile/default.nix b/scripts/lib/setup/nix/mobile/default.nix
index bfcbacfcfe..9e13f4a78c 100644
--- a/scripts/lib/setup/nix/mobile/default.nix
+++ b/scripts/lib/setup/nix/mobile/default.nix
@@ -12,7 +12,7 @@ let
 
 in
   {
-    buildInputs = [ bundler ] ++
+    buildInputs = [ bundler ruby ] ++ ## bundler/ruby used for fastlane
       lib.optional targetAndroid [
         android-ndk
         openjdk