diff --git a/pkgs/tools/networking/babeld/default.nix b/pkgs/tools/networking/babeld/default.nix
index 5714a75e50e..6e8c7669f0d 100644
--- a/pkgs/tools/networking/babeld/default.nix
+++ b/pkgs/tools/networking/babeld/default.nix
@@ -1,17 +1,27 @@
-{ lib, stdenv, fetchurl, nixosTests }:
+{ lib
+, stdenv
+, fetchurl
+, nixosTests
+}:
 
 stdenv.mkDerivation rec {
   pname = "babeld";
-  version = "1.12.1";
+  version = "1.12.2";
 
   src = fetchurl {
     url = "https://www.irif.fr/~jch/software/files/${pname}-${version}.tar.gz";
-    sha256 = "sha256-mrWdesdB82MN8j+cO2fGApTYs0q2IjmPm4l3OoeOyx4=";
+    hash = "sha256-HbIrYZMHDqJFChq1EZb9cvWKEyn3gMsDiOLksud2jLs=";
   };
 
-  preBuild = ''
-    makeFlags="PREFIX=$out ETCDIR=$out/etc"
-  '';
+  outputs = [
+    "out"
+    "man"
+  ];
+
+  makeFlags = [
+    "PREFIX=${placeholder "out"}"
+    "ETCDIR=${placeholder "out"}/etc"
+  ];
 
   passthru.tests.babeld = nixosTests.babeld;