diff --git a/.gitignore b/.gitignore
index d94f902..dcc6865 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
-/chrony-1.26.tar.gz
-/chrony-1.26-20110831gitb088b7.patch.gz
+/chrony-1.27-pre1.tar.gz
diff --git a/chrony.spec b/chrony.spec
index 9057889..6970090 100644
--- a/chrony.spec
+++ b/chrony.spec
@@ -1,7 +1,7 @@
-%define gitpatch 20110831gitb088b7
+%define prerelease -pre1
 Name:           chrony
-Version:        1.26
-Release:        6%{?gitpatch:.%{gitpatch}}%{?dist}
+Version:        1.27
+Release:        0.1.pre1%{?gitpatch:.%{gitpatch}}%{?dist}
 Summary:        An NTP client/server
 
 Group:          System Environment/Daemons
@@ -19,7 +19,7 @@ Source9:        chrony-wait.service
 %{?gitpatch:Patch0: chrony-%{version}-%{gitpatch}.patch.gz}
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
-BuildRequires:  libcap-devel libedit-devel pps-tools-devel bison texinfo
+BuildRequires:  libcap-devel libedit-devel nss-devel pps-tools-devel bison texinfo
 
 Requires(pre):  shadow-utils
 Requires(post): systemd-units info chkconfig
diff --git a/sources b/sources
index 7002c59..c8a7547 100644
--- a/sources
+++ b/sources
@@ -1,2 +1 @@
-ad6dd619ff1986e4ff780363c64e2246  chrony-1.26.tar.gz
-c1b3aa0ba31504831dd31787ad042c67  chrony-1.26-20110831gitb088b7.patch.gz
+09185059c85789f7a62076d6e069437f  chrony-1.27-pre1.tar.gz