nixpkgs/pkgs/development/python-modules/pywal/feh.patch

commit c31faa212e09aa62c232d9008e05976b1cdc9ee5
Author: Frederik Rietdijk <fridh@fridh.nl>
Date:   Wed Dec 26 12:54:32 2018 +0100

    nix: hardcode feh

diff --git a/pywal/wallpaper.py b/pywal/wallpaper.py
index ba61e66..fad34f7 100644
--- a/pywal/wallpaper.py
+++ b/pywal/wallpaper.py
@@ -47,27 +47,7 @@ def xfconf(path, img):
 
 def set_wm_wallpaper(img):
     """Set the wallpaper for non desktop environments."""
-    if shutil.which("feh"):
-        util.disown(["feh", "--bg-fill", img])
-
-    elif shutil.which("nitrogen"):
-        util.disown(["nitrogen", "--set-zoom-fill", img])
-
-    elif shutil.which("bgs"):
-        util.disown(["bgs", "-z", img])
-
-    elif shutil.which("hsetroot"):
-        util.disown(["hsetroot", "-fill", img])
-
-    elif shutil.which("habak"):
-        util.disown(["habak", "-mS", img])
-
-    elif shutil.which("display"):
-        util.disown(["display", "-backdrop", "-window", "root", img])
-
-    else:
-        logging.error("No wallpaper setter found.")
-        return
+    return util.disown(["@feh@", "--bg-fill", img])
 
 
 def set_desktop_wallpaper(desktop, img):