diff --git a/pkgs/os-specific/linux/batman-adv/alfred.nix b/pkgs/os-specific/linux/batman-adv/alfred.nix
index eccb3e716603..fa2be46688cb 100644
--- a/pkgs/os-specific/linux/batman-adv/alfred.nix
+++ b/pkgs/os-specific/linux/batman-adv/alfred.nix
@@ -1,14 +1,14 @@
 { stdenv, fetchurl, pkgconfig, gpsd, libcap, libnl }:
 
-let
-  ver = "2019.5";
-in
+let cfg = import ./version.nix; in
+
 stdenv.mkDerivation rec {
-  name = "alfred-${ver}";
+  pname = "alfred";
+  inherit (cfg) version;
 
   src = fetchurl {
-    url = "https://downloads.open-mesh.org/batman/releases/batman-adv-${ver}/${name}.tar.gz";
-    sha256 = "09npizg89ks1wm19l5xz0pq1ljpsbwy030xnprqnd0p53976wywa";
+    url = "https://downloads.open-mesh.org/batman/releases/batman-adv-${version}/${pname}-${version}.tar.gz";
+    sha256 = cfg.sha256.${pname};
   };
 
   nativeBuildInputs = [ pkgconfig ];
diff --git a/pkgs/os-specific/linux/batman-adv/batctl.nix b/pkgs/os-specific/linux/batman-adv/batctl.nix
index 537010dea53d..57bafb398d1e 100644
--- a/pkgs/os-specific/linux/batman-adv/batctl.nix
+++ b/pkgs/os-specific/linux/batman-adv/batctl.nix
@@ -1,14 +1,14 @@
 { stdenv, fetchurl, pkgconfig, libnl }:
 
-let
-  ver = "2019.3";
-in
+let cfg = import ./version.nix; in
+
 stdenv.mkDerivation rec {
-  name = "batctl-${ver}";
+  pname = "batctl";
+  inherit (cfg) version;
 
   src = fetchurl {
-    url = "https://downloads.open-mesh.org/batman/releases/batman-adv-${ver}/${name}.tar.gz";
-    sha256 = "0307a01n72kg7vcm60mi8jna6bydiin2cr3ylrixra1596hkzn9b";
+    url = "https://downloads.open-mesh.org/batman/releases/batman-adv-${version}/${pname}-${version}.tar.gz";
+    sha256 = cfg.sha256.${pname};
   };
 
   nativeBuildInputs = [ pkgconfig ];
diff --git a/pkgs/os-specific/linux/batman-adv/default.nix b/pkgs/os-specific/linux/batman-adv/default.nix
index 456872cdbd48..796be1e5d484 100644
--- a/pkgs/os-specific/linux/batman-adv/default.nix
+++ b/pkgs/os-specific/linux/batman-adv/default.nix
@@ -1,13 +1,14 @@
 { stdenv, fetchurl, kernel }:
 
-let base = "batman-adv-2019.2"; in
+let cfg = import ./version.nix; in
 
-stdenv.mkDerivation {
-  name = "${base}-${kernel.version}";
+stdenv.mkDerivation rec {
+  pname = "batman-adv";
+  version = "${cfg.version}-${kernel.version}";
 
   src = fetchurl {
-    url = "http://downloads.open-mesh.org/batman/releases/${base}/${base}.tar.gz";
-    sha256 = "1j5day3hia5nd21kb3msjblrybfr5sjnhrx7h5bb5ll8rykgdhvh";
+    url = "http://downloads.open-mesh.org/batman/releases/${pname}-${cfg.version}/${pname}-${cfg.version}.tar.gz";
+    sha256 = cfg.sha256.${pname};
   };
 
   nativeBuildInputs = kernel.moduleBuildDependencies;
diff --git a/pkgs/os-specific/linux/batman-adv/version.nix b/pkgs/os-specific/linux/batman-adv/version.nix
new file mode 100644
index 000000000000..287106fa8d2f
--- /dev/null
+++ b/pkgs/os-specific/linux/batman-adv/version.nix
@@ -0,0 +1,9 @@
+{
+  version = "2019.4";
+
+  sha256 = {
+    batman-adv = "1j5day3hia5nd21kb3msjblrybfr5sjnhrx7h5bb5ll8rykgdhvh";
+    alfred = "1shqdashi9y87z2brmb67qk91aqsvvwyphas6da4c04mclwmnlmm";
+    batctl = "11bndsjq8xrqrdgsr2a670vwihkljjrg58ngq0nkadbkfawlwmm3";
+  };
+}