diff --git a/pkgs/tools/system/thermald/default.nix b/pkgs/tools/system/thermald/default.nix
index d5936b00806e..ddd6740c9836 100644
--- a/pkgs/tools/system/thermald/default.nix
+++ b/pkgs/tools/system/thermald/default.nix
@@ -16,9 +16,9 @@ stdenv.mkDerivation rec {
   patchPhase = ''sed -e 's/upstartconfdir = \/etc\/init/upstartconfdir = $(out)\/etc\/init/' -i data/Makefile.am'';
 
   preConfigure = ''
-                   export PKG_CONFIG_PATH="${dbus_libs.dev}/lib/pkgconfig:$PKG_CONFIG_PATH"
-                   ./autogen.sh #--prefix="$out"
-                 '';
+    export PKG_CONFIG_PATH="${dbus_libs.dev}/lib/pkgconfig:$PKG_CONFIG_PATH"
+    ./autogen.sh
+  '';
 
   configureFlags = [
     "--sysconfdir=$(out)/etc" "--localstatedir=/var"
@@ -26,8 +26,6 @@ stdenv.mkDerivation rec {
     "--with-systemdsystemunitdir=$(out)/etc/systemd/system"
     ];
 
-  preInstall = "sysconfdir=$out/etc";
-
   meta = with stdenv.lib; {
     description = "Thermal Daemon";
     homepage = "https://01.org/linux-thermal-daemon";