skimpdf: add wrappers for cli tools

pkgs/by-name/sk/skimpdf/package.nix

@@ -3,6 +3,7 @@
   lib,
   undmg,
   fetchurl,
+  makeWrapper,
 }:
 stdenv.mkDerivation rec {
   pname = "Skim";
@@ -14,14 +15,20 @@ stdenv.mkDerivation rec {
     hash = "sha256-0IfdLeH6RPxf4OZWnNltN7tvvZWbWDQaMCmazd4UUi4=";
   };
 
-  nativeBuildInputs = [ undmg ];
+  nativeBuildInputs = [
+    undmg
+    makeWrapper
+  ];
 
   sourceRoot = ".";
 
   installPhase = ''
     runHook preInstall
-    mkdir -p $out/Applications
+    mkdir -p $out/Applications $out/bin
     cp -R Skim.app $out/Applications
+    for app in displayline skimnotes skimpdf; do
+      makeWrapper $out/Applications/Skim.app/Contents/SharedSupport/$app $out/bin/$app
+    done
     runHook postInstall
   '';