diff --git a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
index 0fc9bdba99b1..d4c699921b75 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
@@ -1129,6 +1129,13 @@
           <link xlink:href="options.html#opt-systemd.oomd.enableUserServices">systemd.oomd.enableUserServices</link>.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          The <literal>tt-rss</literal> service performs two database
+          migrations when you first use its web UI after upgrade.
+          Consider backing up its database before updating.
+        </para>
+      </listitem>
       <listitem>
         <para>
           The <literal>pass-secret-service</literal> package now
diff --git a/nixos/doc/manual/release-notes/rl-2211.section.md b/nixos/doc/manual/release-notes/rl-2211.section.md
index a5d0b2dbcf9d..391015c46660 100644
--- a/nixos/doc/manual/release-notes/rl-2211.section.md
+++ b/nixos/doc/manual/release-notes/rl-2211.section.md
@@ -346,6 +346,8 @@ Available as [services.patroni](options.html#opt-services.patroni.enable).
   [systemd.oomd.enableRootSlice](options.html#opt-systemd.oomd.enableRootSlice),
   [systemd.oomd.enableSystemSlice](options.html#opt-systemd.oomd.enableSystemSlice),
   and [systemd.oomd.enableUserServices](options.html#opt-systemd.oomd.enableUserServices).
+  
+- The `tt-rss` service performs two database migrations when you first use its web UI after upgrade. Consider backing up its database before updating.
 
 - The `pass-secret-service` package now includes systemd units from upstream, so adding it to the NixOS `services.dbus.packages` option will make it start automatically as a systemd user service when an application tries to talk to the libsecret D-Bus API.
 
diff --git a/pkgs/servers/tt-rss/default.nix b/pkgs/servers/tt-rss/default.nix
index 39615a238e35..7ec0f56f6192 100644
--- a/pkgs/servers/tt-rss/default.nix
+++ b/pkgs/servers/tt-rss/default.nix
@@ -1,16 +1,14 @@
-{ lib, stdenv, fetchurl }:
+{ lib, stdenv, fetchgit }:
 
 stdenv.mkDerivation rec {
   pname = "tt-rss";
-  year = "21";
-  month = "06";
-  day = "21";
-  version = "20${year}-${month}-${day}";
+  version = "unstable-2022-08-01";
   rev = "cd26dbe64c9b14418f0b2d826a38a35c6bf8a270";
 
-  src = fetchurl {
-    url = "https://git.tt-rss.org/fox/tt-rss/archive/${rev}.tar.gz";
-    sha256 = "1dpmzi7hknv5rk2g1iw13r8zcxcwrhkd5hhf292ml0dw3cwki0gm";
+  src = fetchgit {
+    url = "https://git.tt-rss.org/fox/tt-rss.git";
+    rev = "ed2cbeffcc456a86726b52d37c977a35b895968c";
+    sha256 = "0ab1q316y4f432z2kwn86kc144awk529cild7b4jbffh2ydlj3r4";
   };
 
   installPhase = ''
@@ -21,7 +19,7 @@ stdenv.mkDerivation rec {
 
     # see the code of Config::get_version(). you can check that the version in
     # the footer of the preferences pages is not UNKNOWN
-    echo "${year}.${month}" > $out/version_static.txt
+    echo "22.08" > $out/version_static.txt
 
     runHook postInstall
   '';