diff --git a/nixos/doc/manual/release-notes/release-notes.xml b/nixos/doc/manual/release-notes/release-notes.xml
index 94f176186b6..a222bfa29d5 100644
--- a/nixos/doc/manual/release-notes/release-notes.xml
+++ b/nixos/doc/manual/release-notes/release-notes.xml
@@ -8,6 +8,7 @@
   This section lists the release notes for each stable version of NixOS and
   current unstable revision.
  </para>
+ <xi:include href="rl-1903.xml" />
  <xi:include href="rl-1809.xml" />
  <xi:include href="rl-1803.xml" />
  <xi:include href="rl-1709.xml" />
diff --git a/nixos/doc/manual/release-notes/rl-1903.xml b/nixos/doc/manual/release-notes/rl-1903.xml
new file mode 100644
index 00000000000..9ae34dd58ab
--- /dev/null
+++ b/nixos/doc/manual/release-notes/rl-1903.xml
@@ -0,0 +1,58 @@
+<section xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xmlns:xi="http://www.w3.org/2001/XInclude"
+         version="5.0"
+         xml:id="sec-release-19.03">
+ <title>Release 19.03 (“Koi”, 2019/03/??)</title>
+
+ <section xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xmlns:xi="http://www.w3.org/2001/XInclude"
+         version="5.0"
+         xml:id="sec-release-19.03-highlights">
+  <title>Highlights</title>
+
+  <para>
+   In addition to numerous new and upgraded packages, this release has the
+   following highlights:
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para />
+   </listitem>
+  </itemizedlist>
+ </section>
+
+ <section xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xmlns:xi="http://www.w3.org/2001/XInclude"
+         version="5.0"
+         xml:id="sec-release-19.03-new-services">
+  <title>New Services</title>
+
+  <para>
+   The following new services were added since the last release:
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para />
+   </listitem>
+  </itemizedlist>
+ </section>
+
+ <section xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xmlns:xi="http://www.w3.org/2001/XInclude"
+         version="5.0"
+         xml:id="sec-release-19.03-notable-changes">
+  <title>Other Notable Changes</title>
+
+  <itemizedlist>
+   <listitem>
+    <para />
+   </listitem>
+  </itemizedlist>
+ </section>
+</section>
diff --git a/nixos/modules/misc/version.nix b/nixos/modules/misc/version.nix
index 63717e0c6a8..c593adcdae6 100644
--- a/nixos/modules/misc/version.nix
+++ b/nixos/modules/misc/version.nix
@@ -84,7 +84,7 @@ in
       versionSuffix = mkIf (pathIsDirectory gitRepo) (mkDefault (".git." + gitCommitId));
 
       # Note: the first letter is bumped on every release.  It's an animal.
-      codeName = "Jellyfish";
+      codeName = "Koi";
     };
 
     # Generate /etc/os-release.  See