diff --git a/pkgs/development/libraries/libassuan/default.nix b/pkgs/development/libraries/libassuan/default.nix
index e625334cefaf..5202ad83605c 100644
--- a/pkgs/development/libraries/libassuan/default.nix
+++ b/pkgs/development/libraries/libassuan/default.nix
@@ -8,10 +8,15 @@ stdenv.mkDerivation rec {
     sha256 = "1ikf9whfi7rg71qa610ynyv12qrw20zkn7zxgvvr9dp41gbqxxbx";
   };
 
-  propagatedBuildInputs = [ libgpgerror pth ];
+  buildInputs = [ libgpgerror pth ];
 
   doCheck = true;
 
+  # Make sure includes are fixed for callers who don't use libassuan-config
+  postInstall = ''
+    sed -i 's,#include <gpg-error.h>,#include "${libgpgerror}/include/gpg-error.h",g' $out/include/assuan.h
+  '';
+
   meta = {
     description = "IPC library used by GnuPG and related software";