diff --git a/pkgs/development/libraries/ffmpegthumbnailer/default.nix b/pkgs/development/libraries/ffmpegthumbnailer/default.nix
index 10e9b70d42ed..ff1a8615ab79 100644
--- a/pkgs/development/libraries/ffmpegthumbnailer/default.nix
+++ b/pkgs/development/libraries/ffmpegthumbnailer/default.nix
@@ -39,6 +39,11 @@ stdenv.mkDerivation rec {
       --replace '$'{exec_prefix}/@CMAKE_INSTALL_LIBDIR@ @CMAKE_INSTALL_FULL_LIBDIR@
   '';
 
+  postInstall = ''
+    substituteInPlace $out/share/thumbnailers/ffmpegthumbnailer.thumbnailer \
+      --replace-fail '=ffmpegthumbnailer' "=$out/bin/ffmpegthumbnailer"
+  '';
+
   meta = with lib; {
     description = "Lightweight video thumbnailer";
     longDescription = "FFmpegthumbnailer is a lightweight video