update preffix, in order to avoid pkg conflicts on pool
diff --git a/aptly/server/mirror/ubuntu/xenial/ubuntu.yml b/aptly/server/mirror/ubuntu/xenial/ubuntu.yml
index b202450..e5edb0e 100644
--- a/aptly/server/mirror/ubuntu/xenial/ubuntu.yml
+++ b/aptly/server/mirror/ubuntu/xenial/ubuntu.yml
@@ -3,7 +3,7 @@
     server:
       mirror:
         xenial-main:
-          source: http://cz.archive.ubuntu.com/ubuntu/
+          source: http://in.archive.ubuntu.com/ubuntu/
           distribution: xenial
           components: main
           architectures: amd64
@@ -14,9 +14,9 @@
           publisher:
             component: main
             distributions:
-              - nightly/xenial
+              - xenial/nightly
         xenial-universe:
-          source: http://cz.archive.ubuntu.com/ubuntu/
+          source: http://in.archive.ubuntu.com/ubuntu/
           distribution: xenial
           components: universe
           architectures: amd64
@@ -27,9 +27,9 @@
           publisher:
             component: main
             distributions:
-              - nightly/xenial
+              - xenial/nightly
         xenial-updates:
-          source: http://cz.archive.ubuntu.com/ubuntu/
+          source: http://in.archive.ubuntu.com/ubuntu/
           distribution: xenial-updates
           components: main
           architectures: amd64
@@ -40,9 +40,9 @@
           publisher:
             component: main
             distributions:
-              - nightly/xenial
+              - xenial/nightly
         xenial-updates-universe:
-          source: http://cz.archive.ubuntu.com/ubuntu/
+          source: http://in.archive.ubuntu.com/ubuntu/
           distribution: xenial-updates
           components: universe
           architectures: amd64
@@ -53,9 +53,9 @@
           publisher:
             component: main
             distributions:
-              - nightly/xenial
+              - xenial/nightly
         xenial-security:
-          source: http://cz.archive.ubuntu.com/ubuntu/
+          source: http://in.archive.ubuntu.com/ubuntu/
           distribution: xenial-security
           components: main
           architectures: amd64
@@ -66,4 +66,4 @@
           publisher:
             component: security
             distributions:
-              - nightly/xenial
+              - xenial/nightly