diff --git a/pkgs/applications/audio/vkeybd/default.nix b/pkgs/applications/audio/vkeybd/default.nix
index ec6391562174..642a75f71f2f 100644
--- a/pkgs/applications/audio/vkeybd/default.nix
+++ b/pkgs/applications/audio/vkeybd/default.nix
@@ -19,10 +19,6 @@ stdenv.mkDerivation  rec {
 
   makeFlags = [ "TKLIB=-l${tk.libPrefix}" "TCLLIB=-l${tcl.libPrefix}" ];
 
-  postInstall = ''
-    wrapProgram $out/bin/vkeybd --set TK_LIBRARY "${tk}/lib/${tk.libPrefix}"
-  '';
-
   meta = with lib; {
     description = "Virtual MIDI keyboard";
     homepage = "https://www.alsa-project.org/~tiwai/alsa.html";
diff --git a/pkgs/applications/misc/wordnet/default.nix b/pkgs/applications/misc/wordnet/default.nix
index d49f55574a86..88cc16ae7645 100644
--- a/pkgs/applications/misc/wordnet/default.nix
+++ b/pkgs/applications/misc/wordnet/default.nix
@@ -25,7 +25,6 @@ stdenv.mkDerivation rec {
   ];
 
   postInstall = ''
-    wrapProgram $out/bin/wishwn --set TK_LIBRARY "${tk}/lib/${tk.libPrefix}"
     wrapProgram $out/bin/wnb    --prefix PATH : "$out/bin"
   '';
 
diff --git a/pkgs/games/chessdb/default.nix b/pkgs/games/chessdb/default.nix
index 4b96662d84d7..db6214bdf096 100644
--- a/pkgs/games/chessdb/default.nix
+++ b/pkgs/games/chessdb/default.nix
@@ -20,10 +20,6 @@ stdenv.mkDerivation rec {
     "MANDIR=$(out)/man"
   ];
 
-  postInstall = ''
-    wrapProgram $out/bin/chessdb --set TK_LIBRARY "${tk}/lib/${tk.libPrefix}"
-  '';
-
   meta = {
     homepage = "https://chessdb.sourceforge.net/";
     description = "A free chess database";