diff --git a/lib/buildpack/compile/dnu.rb b/lib/buildpack/compile/dnu.rb
index 42423585f..efd4f3a19 100644
--- a/lib/buildpack/compile/dnu.rb
+++ b/lib/buildpack/compile/dnu.rb
@@ -22,6 +22,7 @@ def initialize(shell)
 
     def restore(dir, out)
       @shell.env['HOME'] = dir
+      @shell.path << '/app/mono/bin'
       cmd = "bash -c 'source #{dir}/.dnx/dnvm/dnvm.sh; dnvm use default -r mono -a x64; cd #{dir}; dnu restore'"
       @shell.exec(cmd, out)
     end
diff --git a/lib/buildpack/compile/dnx_installer.rb b/lib/buildpack/compile/dnx_installer.rb
index 671e61186..f7efda505 100644
--- a/lib/buildpack/compile/dnx_installer.rb
+++ b/lib/buildpack/compile/dnx_installer.rb
@@ -28,6 +28,7 @@ def initialize(shell)
 
     def install(dir, out)
       @shell.env['HOME'] = dir
+      @shell.path << '/app/mono/bin'
       version = dnx_version(dir, out)
       @shell.exec("bash -c 'source #{dir}/.dnx/dnvm/dnvm.sh; dnvm install #{version} -p -r mono'", out)
     end
diff --git a/lib/buildpack/compiler.rb b/lib/buildpack/compiler.rb
index 22a56511e..ff1933c82 100644
--- a/lib/buildpack/compiler.rb
+++ b/lib/buildpack/compiler.rb
@@ -79,12 +79,17 @@ def copy_nowin(out)
     end
 
     def install_mozroot_certs(out)
-      mozroots.import(out)
+      dest_dir = File.join(build_dir, '..')
+      unless File.exist? File.join(dest_dir, '.config', '.mono', 'certs')
+        mozroots.import(out)
+        copier.cp(File.join(Dir.home, '.config', '.mono', 'certs'), File.join(dest_dir, '.config', '.mono'), out)
+      end
     end
 
     def restore_cache(out)
       copier.cp(File.join(cache_dir, '.dnx'), build_dir, out) if File.exist? File.join(cache_dir, '.dnx')
       copier.cp(File.join(cache_dir, 'mono'), File.join('/', 'app'), out) if File.exist? File.join(cache_dir, 'mono')
+      copier.cp(File.join(cache_dir, 'certs'), File.join(build_dir, '..', '.config', '.mono'), out) if File.exist? File.join(cache_dir, 'certs')
     end
 
     def install_dnvm(out)
@@ -106,6 +111,7 @@ def move_to_app_dir(out)
     def save_cache(out)
       copier.cp(File.join(build_dir, '.dnx'), cache_dir, out)
       copier.cp(File.join('/app', 'mono'), cache_dir, out) unless File.exists? File.join(cache_dir, 'mono')
+      copier.cp(File.join(Dir.home, '.config', '.mono', 'certs'), cache_dir, out) unless File.exists? File.join(cache_dir, 'certs')
     end
 
     def write_release_yml(out)
diff --git a/spec/buildpack/compile/compile_spec.rb b/spec/buildpack/compile/compile_spec.rb
index d8369b4eb..015a73c5c 100644
--- a/spec/buildpack/compile/compile_spec.rb
+++ b/spec/buildpack/compile/compile_spec.rb
@@ -154,8 +154,17 @@
 
       it 'imports the certificates' do
         expect(mozroots).to receive(:import)
+        expect(copier).to receive(:cp).with(File.join(Dir.home, '.config', '.mono', 'certs'), File.join(build_dir, '..', '.config', '.mono'), anything)
         compiler.compile
       end
+
+      context 'when the certificates are already downloaded' do
+        it 'does not re-download then' do
+          allow(File).to receive(:exist?).and_return(true)
+          expect(copier).not_to receive(:cp).with(File.join(Dir.home, '.config', '.mono', 'certs'), anything)
+          compiler.compile
+        end
+      end
     end
 
     describe 'Installing DNVM' do
@@ -181,11 +190,13 @@
         before(:each) do
           Dir.mkdir(File.join(cache_dir, '.dnx'))
           Dir.mkdir(File.join(cache_dir, 'mono'))
+          FileUtils.mkdir_p(File.join(cache_dir, 'certs'))
         end
 
         it 'restores all files from the cache to build dir' do
           expect(copier).to receive(:cp).with(File.join(cache_dir, '.dnx'), build_dir, anything)
           expect(copier).to receive(:cp).with(File.join(cache_dir, 'mono'), '/app', anything)
+          expect(copier).to receive(:cp).with(File.join(cache_dir, 'certs'), File.join(build_dir, '..', '.config', '.mono'), anything)
           compiler.compile
         end
       end
@@ -215,12 +226,15 @@
       it 'copies .dnx and mono to cache dir' do
         expect(copier).to receive(:cp).with("#{build_dir}/.dnx", cache_dir, anything)
         expect(copier).to receive(:cp).with('/app/mono', cache_dir, anything)
+        expect(copier).to receive(:cp).with(File.join(Dir.home, '.config', '.mono', 'certs'), cache_dir, anything)
         compiler.compile
       end
 
-      context 'when mono is already cached' do
+      context 'when the cache already exists' do
         before(:each) do
+          Dir.mkdir(File.join(cache_dir, '.dnx'))
           Dir.mkdir(File.join(cache_dir, 'mono'))
+          FileUtils.mkdir_p(File.join(cache_dir, '.config', '.mono', 'certs'))
         end
         it 'copies only .dnx to cache dir' do
           expect(copier).to receive(:cp).with("#{build_dir}/.dnx", cache_dir, anything)
diff --git a/spec/buildpack/compile/dnu_spec.rb b/spec/buildpack/compile/dnu_spec.rb
index 0fd30be4c..4892028f4 100644
--- a/spec/buildpack/compile/dnu_spec.rb
+++ b/spec/buildpack/compile/dnu_spec.rb
@@ -19,7 +19,7 @@
 
 describe AspNet5Buildpack::DNU do
   let(:shell) do
-    double(:shell, env: {})
+    double(:shell, env: {}, path: [])
   end
 
   let(:out) do
@@ -37,6 +37,12 @@
     expect(shell.env).to include('HOME' => 'app-dir')
   end
 
+  it 'adds /app/mono/bin to the path' do
+    allow(shell).to receive(:exec)
+    dnu.restore('app-dir', out)
+    expect(shell.path).to include('/app/mono/bin')
+  end
+
   it 'adds dnu to the PATH' do
     allow(shell).to receive(:exec)
     expect(shell).to receive(:exec).with(match('dnvm use default'), out)
@@ -54,4 +60,5 @@
     expect(shell).to receive(:exec).with(match('dnu restore'), out)
     dnu.restore('app-dir', out)
   end
+
 end
diff --git a/spec/buildpack/compile/dnx_install_spec.rb b/spec/buildpack/compile/dnx_install_spec.rb
index ccca55fc6..1484f8628 100644
--- a/spec/buildpack/compile/dnx_install_spec.rb
+++ b/spec/buildpack/compile/dnx_install_spec.rb
@@ -20,7 +20,7 @@
 
 describe AspNet5Buildpack::DnxInstaller do
   let(:shell) do
-    double(:shell, env: {})
+    double(:shell, env: {}, path: [])
   end
 
   let(:out) do
@@ -41,6 +41,12 @@
     expect(shell.env).to include('HOME' => dir)
   end
 
+  it 'adds /app/mono/bin to the path' do
+    allow(shell).to receive(:exec)
+    installer.install(dir, out)
+    expect(shell.path).to include('/app/mono/bin')
+  end
+
   it 'sources the dnvm script' do
     allow(shell).to receive(:exec)
     expect(shell).to receive(:exec).with(match("source #{dir}/.dnx/dnvm/dnvm.sh"), out)