diff --git a/pkgs/development/tools/literate-programming/noweb/default.nix b/pkgs/development/tools/literate-programming/noweb/default.nix
index 756da8a85393..44df2b1e1534 100644
--- a/pkgs/development/tools/literate-programming/noweb/default.nix
+++ b/pkgs/development/tools/literate-programming/noweb/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation {
   postInstall= ''
     substituteInPlace $out/bin/cpif --replace "PATH=/bin:/usr/bin" ""
     for f in $out/bin/{noweb,nountangle,noroots,noroff,noindex} \
-             $out/lib/noweb/{toroff,btdefn,totex,pipedoc,noidx,unmarkup,toascii,tohtml,emptydefn}; do
+             $out/lib/noweb/{toroff,btdefn,totex,noidx,unmarkup,toascii,tohtml,emptydefn}; do
       substituteInPlace $f --replace "nawk" "${gawk}/bin/awk"
     done
   '';