diff --git a/pkgs/tools/text/multitran/libmtquery/default.nix b/pkgs/tools/text/multitran/libmtquery/default.nix
index 153184bf70f3..8b2032dcaba5 100644
--- a/pkgs/tools/text/multitran/libmtquery/default.nix
+++ b/pkgs/tools/text/multitran/libmtquery/default.nix
@@ -9,6 +9,10 @@ stdenv.mkDerivation {
 
   buildInputs = [ libmtsupport libfacet libbtree multitrandata ];
 
+  NIX_LDFLAGS = [
+    "-lbtree"
+  ];
+
   patchPhase = ''
     sed -i -e 's@\$(DESTDIR)/usr@'$out'@' \
       -e 's@/usr/include/mt/support@${libmtsupport}/include/mt/support@' \