diff --git a/pkgs/additional/koreader-from-src/default.nix b/pkgs/additional/koreader-from-src/default.nix
index 4ab7e6a2..c3e98bea 100644
--- a/pkgs/additional/koreader-from-src/default.nix
+++ b/pkgs/additional/koreader-from-src/default.nix
@@ -365,41 +365,6 @@ stdenv.mkDerivation rec {
         --replace-quiet 'ffi.load("libs/' 'ffi.load("'
     done
 
-    # reduce deps so that Make doesn't try to rebuild all the thirdparty libraries.
-    # could probably do this better, like by changing the atime of all of thirdparty/ to match /nix/store products
-    # substituteInPlace base/Makefile.third --replace-warn '/*.*' '/'
-    substituteInPlace base/Makefile.third \
-      --replace-warn '$(THIRDPARTY_DIR)/curl/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/czmq/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/djvulibre/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/dropbear/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/freetype2/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/fribidi/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/gettext/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/giflib/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/glib/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/harfbuzz/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/libiconv/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/libjpeg-turbo/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/libpng/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/libunibreak/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/libwebp/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/lpeg/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/lua-rapidjson/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/luajit/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/luasec/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/luasocket/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/openssh/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/openssl/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/sdcv/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/sqlite/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/tar/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/utf8proc/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/zlib/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/libzmq/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/zstd/*.*' "" \
-      --replace-warn '$(THIRDPARTY_DIR)/zsync2/*.*' "" \
-
     # lots of places in Makefile.third (incorrectly) assume lib paths are relative to CURDIR,
     # so link /nix into CURDIR to allow them to work anyway
     ln -s /nix base/nix