diff --git a/src/rosdep2/platforms/arch.py b/src/rosdep2/platforms/arch.py
index 8fad48bc86..5f1094375c 100644
--- a/src/rosdep2/platforms/arch.py
+++ b/src/rosdep2/platforms/arch.py
@@ -38,14 +38,14 @@
 
 def register_installers(context):
     context.set_installer(PACMAN_INSTALLER, PacmanInstaller())
-    
+
 def register_platforms(context):
     context.add_os_installer_key(ARCH_OS_NAME, SOURCE_INSTALLER)
     context.add_os_installer_key(ARCH_OS_NAME, PACMAN_INSTALLER)
     context.set_default_os_installer_key(ARCH_OS_NAME, lambda self: PACMAN_INSTALLER)
 
 def pacman_detect_single(p):
-    return not subprocess.call(['pacman', '-Q', p], stdout=subprocess.PIPE, stderr=subprocess.PIPE)    
+    return not subprocess.call(['pacman', '-Q', p], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 
 def pacman_detect(packages):
     return [p for p in packages if pacman_detect_single(p)]
@@ -57,8 +57,14 @@ def __init__(self):
 
     def get_install_command(self, resolved, interactive=True, reinstall=False, quiet=False):
         #TODO: interactive switch
-        packages = self.get_packages_to_install(resolved, reinstall=reinstall)        
+        packages = self.get_packages_to_install(resolved, reinstall=reinstall)
         if not packages:
             return []
-        else:
-            return [self.elevate_priv(['pacman', '-Sy', '--needed', p]) for p in packages]
+
+        command  = ['pacman', '-S']
+
+        if not interactive: command.append('--noconfirm')
+        if not reinstall:   command.append('--needed')
+        if quiet:           command.append('-q')
+
+        return [self.elevate_priv(command + packages)]
diff --git a/test/test_rosdep_arch.py b/test/test_rosdep_arch.py
index a4bebe2c5e..ae0e667700 100644
--- a/test/test_rosdep_arch.py
+++ b/test/test_rosdep_arch.py
@@ -46,12 +46,10 @@ def test(mock_method):
 
         # no interactive option implemented yet
         mock_method.return_value = ['a', 'b']
-        expected = [['sudo', '-H', 'pacman', '-Sy', '--needed', 'a'],
-                    ['sudo', '-H', 'pacman', '-Sy', '--needed', 'b']]
+        expected = [['sudo', '-H', 'pacman', '-S', '--noconfirm', '--needed', 'a', 'b']]
         val = installer.get_install_command(['whatever'], interactive=False)
         assert val == expected, val
-        expected = [['sudo', '-H', 'pacman', '-Sy', '--needed', 'a'],
-                    ['sudo', '-H', 'pacman', '-Sy', '--needed', 'b']]
+        expected = [['sudo', '-H', 'pacman', '-S', '--needed', 'a', 'b']],
         val = installer.get_install_command(['whatever'], interactive=True)
         assert val == expected, val
     try: