diff --git a/nixos/modules/system/boot/systemd-unit-options.nix b/nixos/modules/system/boot/systemd-unit-options.nix
index 113990814efa..d9dc6549f365 100644
--- a/nixos/modules/system/boot/systemd-unit-options.nix
+++ b/nixos/modules/system/boot/systemd-unit-options.nix
@@ -321,6 +321,23 @@ in rec {
   };
 
 
+  pathOptions = unitOptions // {
+
+    pathConfig = mkOption {
+      default = {};
+      example = { PathChanged = "/some/path"; Unit = "changedpath.service"; };
+      type = types.attrsOf unitOption;
+      description = ''
+        Each attribute in this set specifies an option in the
+        <literal>[Path]</literal> section of the unit.  See
+        <citerefentry><refentrytitle>systemd.path</refentrytitle>
+        <manvolnum>5</manvolnum></citerefentry> for details.
+      '';
+    };
+
+  };
+
+
   mountOptions = unitOptions // {
 
     what = mkOption {
diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index 49502b3e6851..72d724024093 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -304,6 +304,15 @@ let
         '';
     };
 
+  pathToUnit = name: def:
+    { inherit (def) wantedBy requiredBy enable;
+      text = commonUnitText def +
+        ''
+          [Path]
+          ${attrsToSection def.pathConfig}
+        '';
+    };
+
   mountToUnit = name: def:
     { inherit (def) wantedBy requiredBy enable;
       text = commonUnitText def +
@@ -472,6 +481,13 @@ in
       description = "Definition of systemd timer units.";
     };
 
+    systemd.paths = mkOption {
+      default = {};
+      type = types.attrsOf types.optionSet;
+      options = [ pathOptions unitConfig ];
+      description = "Definition of systemd path units.";
+    };
+
     systemd.mounts = mkOption {
       default = [];
       type = types.listOf types.optionSet;
@@ -657,6 +673,7 @@ in
       // mapAttrs' (n: v: nameValuePair "${n}.service" (serviceToUnit n v)) cfg.services
       // mapAttrs' (n: v: nameValuePair "${n}.socket" (socketToUnit n v)) cfg.sockets
       // mapAttrs' (n: v: nameValuePair "${n}.timer" (timerToUnit n v)) cfg.timers
+      // mapAttrs' (n: v: nameValuePair "${n}.path" (pathToUnit n v)) cfg.paths
       // listToAttrs (map
                    (v: let n = escapeSystemdPath v.where;
                        in nameValuePair "${n}.mount" (mountToUnit n v)) cfg.mounts)