diff --git a/examples/rubyonrails/devenv.nix b/examples/rubyonrails/devenv.nix
index 4586b3f9d..c14d14160 100644
--- a/examples/rubyonrails/devenv.nix
+++ b/examples/rubyonrails/devenv.nix
@@ -7,6 +7,8 @@
   packages = [
     pkgs.openssl
     pkgs.libyaml
+    pkgs.git
+    pkgs.curl
   ];
 
   services.postgres.enable = true;
@@ -15,12 +17,12 @@
 
   enterShell = ''
     if [ ! -d "blog" ]; then
-      gem install rails
-      rails new blog --database=postgresql --force
+      gem install rails || exit 1
+      rails new blog --database=postgresql --force || exit 1
     fi
     export PATH="$DEVENV_ROOT/blog/bin:$PATH"
     pushd blog
-      bundle
+      bundle || exit 1
     popd
   '';
 }