curl: enable tests

some tests still skipped due to missing dependencies, but it's
unlikely we want to add these build-time dependencies to such
an early-stage package

pkgs/tools/networking/curl/default.nix

@@ -150,7 +150,16 @@ stdenv.mkDerivation rec {
   CXX = "${stdenv.cc.targetPrefix}c++";
   CXXCPP = "${stdenv.cc.targetPrefix}c++ -E";
 
-  doCheck = false; # expensive, fails
+  doCheck = true;
+  preCheck = ''
+    patchShebangs tests/
+  '' + lib.optionalString stdenv.isDarwin ''
+    # bad interaction with sandbox if enabled?
+    rm tests/data/test1453
+  '' + lib.optionalString stdenv.hostPlatform.isMusl ''
+    # different resolving behaviour?
+    rm tests/data/test1592
+  '';
 
   postInstall = ''
     moveToOutput bin/curl-config "$dev"