diff --git a/pkgs/servers/tvheadend/default.nix b/pkgs/servers/tvheadend/default.nix
index 7ff0796811ad..d8cfadbfab2f 100644
--- a/pkgs/servers/tvheadend/default.nix
+++ b/pkgs/servers/tvheadend/default.nix
@@ -3,7 +3,7 @@
 , which, zlib }:
 
 let
-  version = "4.2.1";
+  version = "4.2.4";
 
 in stdenv.mkDerivation rec {
   name = "tvheadend-${version}";
@@ -12,7 +12,7 @@ in stdenv.mkDerivation rec {
     owner  = "tvheadend";
     repo   = "tvheadend";
     rev    = "v${version}";
-    sha256 = "1lhk8psvifmn4kjwyfxjj21z0apyr59zizzsfd4j22v7bk66rrl9";
+    sha256 = "1kydjmgv0nrllgi2s6aczq4x9ag01c8qm8w962qb52fzdfw7fs6k";
   };
 
   buildInputs = [
@@ -39,7 +39,8 @@ in stdenv.mkDerivation rec {
   preConfigure = ''
     patchShebangs ./configure
 
-    substituteInPlace src/config.c --replace /usr/bin/tar ${gnutar}/bin/tar
+    substituteInPlace src/config.c \
+      --replace /usr/bin/tar ${gnutar}/bin/tar
 
     # the version detection script `support/version` reads this file if it
     # exists, so let's just use that