diff --git a/pkgs/development/libraries/libvirt/default.nix b/pkgs/development/libraries/libvirt/default.nix
index 4b104a04c15d..fd35864fe343 100644
--- a/pkgs/development/libraries/libvirt/default.nix
+++ b/pkgs/development/libraries/libvirt/default.nix
@@ -4,7 +4,7 @@
 , iproute, iptables, readline, lvm2, utillinux, systemd, libpciaccess, gettext
 , libtasn1, ebtables, libgcrypt, yajl, pmutils, libcap_ng, libapparmor
 , dnsmasq, libnl, libpcap, libxslt, xhtml1, numad, numactl, perlPackages
-, curl, libiconv, gmp, zfs, parted, bridge-utils, dmidecode, jansson
+, curl, libiconv, gmp, zfs, parted, bridge-utils, dmidecode
 , enableXen ? false, xen ? null
 , enableIscsi ? false, openiscsi
 }:
@@ -16,26 +16,26 @@ let
   buildFromTarball = stdenv.isDarwin;
 in stdenv.mkDerivation rec {
   name = "libvirt-${version}";
-  version = "4.6.0";
+  version = "4.5.0";
 
   src =
     if buildFromTarball then
       fetchurl {
         url = "http://libvirt.org/sources/${name}.tar.xz";
-        sha256 = "0rj0azi766g0xdxydvkq9nj95hhsiwqgclzzmyxvk2axhb8nrb5l";
+        sha256 = "02dbfyi80im37gdsxglb4fja78q63b8ahmgdc5kh8lx51kf5xsg7";
       }
     else
       fetchgit {
         url = git://libvirt.org/libvirt.git;
         rev = "v${version}";
-        sha256 = "1lv1s93k056wylrlc7j4q45zir9z4qshzcl454spy2wb8cdn3h4s";
+        sha256 = "0ija9a02znajsa2pbxamrmz87zwpmba9s29vdzzqqqw5c1rdpcr6";
         fetchSubmodules = true;
       };
 
   nativeBuildInputs = [ makeWrapper pkgconfig ];
   buildInputs = [
     libxml2 gnutls perl python2 readline gettext libtasn1 libgcrypt yajl
-    libxslt xhtml1 perlPackages.XMLXPath curl libpcap jansson
+    libxslt xhtml1 perlPackages.XMLXPath curl libpcap
   ] ++ optionals (!buildFromTarball) [
     libtool autoconf automake
   ] ++ optionals stdenv.isLinux [
@@ -60,9 +60,7 @@ in stdenv.mkDerivation rec {
       --replace 'lxc_path,' '"/run/libvirt/nix-emulators/libvirt_lxc",'
 
     patchShebangs . # fixes /usr/bin/python references
-    substituteInPlace src/util/virjsoncompat.c --replace \
-        '"libjansson.so.4"' '"${jansson}/lib/libjansson${stdenv.targetPlatform.extensions.sharedLibrary}"'
-   '';
+  '';
 
   configureFlags = [
     "--localstatedir=/var"
diff --git a/pkgs/development/python-modules/libvirt/default.nix b/pkgs/development/python-modules/libvirt/default.nix
index 71e9adf11d2d..26b42020fc34 100644
--- a/pkgs/development/python-modules/libvirt/default.nix
+++ b/pkgs/development/python-modules/libvirt/default.nix
@@ -2,12 +2,12 @@
 
 buildPythonPackage rec {
   pname = "libvirt";
-  version = "4.6.0";
+  version = "4.5.0";
 
   src = assert version == libvirt.version; fetchgit {
     url = git://libvirt.org/libvirt-python.git;
     rev = "v${version}";
-    sha256 = "0yrgibd5c9wy82ak8g9ykar6fma1wf7xzmmc47657lzm70m5av68";
+    sha256 = "0w2rzkxv7jsq4670m0j5c6p4hpyi0r0ja6wd3wdvixcwc6hhx407";
   };
 
   nativeBuildInputs = [ pkgconfig ];
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 7f09630debfc..5add53c0dc24 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -14400,12 +14400,12 @@ let
   };
 
   SysVirt = buildPerlModule rec {
-    version = "4.6.0";
+    version = "4.5.0";
     name = "Sys-Virt-${version}";
     src = assert version == pkgs.libvirt.version; pkgs.fetchgit {
       url = git://libvirt.org/libvirt-perl.git;
       rev = "v${version}";
-      sha256 = "0qs84sdrq85i3xc0drbk71jjm9vq1n8izdwy5zsd5r7dqays5slf";
+      sha256 = "18ns94i29c9x0j50pz9r1vcif6baayz769sa7b51v8kcvam9j52s";
     };
     nativeBuildInputs = [ pkgs.pkgconfig ];
     buildInputs = [ pkgs.libvirt CPANChanges TestPod TestPodCoverage XMLXPath ];