diff --git a/pkgs/os-specific/linux/systemd/cryptsetup-generator.nix b/pkgs/os-specific/linux/systemd/cryptsetup-generator.nix
index d02a531f67f..c89a8ff9147 100644
--- a/pkgs/os-specific/linux/systemd/cryptsetup-generator.nix
+++ b/pkgs/os-specific/linux/systemd/cryptsetup-generator.nix
@@ -11,6 +11,17 @@ stdenv.lib.overrideDerivation systemd (p: {
     ninja systemd-cryptsetup systemd-cryptsetup-generator
   '';
 
+  # As ninja install is not used here, the rpath needs to be manually fixed.
+  # Otherwise the resulting binary doesn't properly link against systemd-shared.so
+  postFixup = ''
+    sharedLib=libsystemd-shared-${p.version}.so
+    for prog in `find $out -type f -executable`; do
+      (patchelf --print-needed $prog | grep $sharedLib > /dev/null) && (
+        patchelf --set-rpath `patchelf --print-rpath $prog`:"$out/lib/systemd" $prog
+      ) || true
+    done
+  '';
+
   installPhase = ''
     mkdir -p $out/lib/systemd/
     cp systemd-cryptsetup $out/lib/systemd/systemd-cryptsetup