diff --git a/cmake/capnp_compat.cmake b/cmake/capnp_compat.cmake
index 588a1ec2..50d9cec2 100644
--- a/cmake/capnp_compat.cmake
+++ b/cmake/capnp_compat.cmake
@@ -2,11 +2,8 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-# CMake target definitions for backwards compatibility with Ubuntu bionic
-# capnproto 0.6.1 package (https://packages.ubuntu.com/bionic/libcapnp-dev)
-
-include(CheckIncludeFileCXX)
-include(CMakePushCheckState)
+# Define capnp_PREFIX if not defined to avoid issue on macos
+# https://github.com/chaincodelabs/libmultiprocess/issues/26
 
 if (NOT DEFINED capnp_PREFIX AND DEFINED CAPNP_INCLUDE_DIRS)
   get_filename_component(capnp_PREFIX "${CAPNP_INCLUDE_DIRS}" DIRECTORY)
@@ -16,6 +13,10 @@ if (NOT DEFINED CAPNPC_OUTPUT_DIR)
   set(CAPNPC_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}")
 endif()
 
+# CMake target definitions for backwards compatibility with Ubuntu bionic
+# capnproto 0.6.1 package (https://packages.ubuntu.com/bionic/libcapnp-dev)
+# https://github.com/chaincodelabs/libmultiprocess/issues/27
+
 if (NOT DEFINED CAPNP_LIB_CAPNPC AND DEFINED CAPNP_LIB_CAPNP-RPC)
   string(REPLACE "-rpc" "c" CAPNP_LIB_CAPNPC "${CAPNP_LIB_CAPNP-RPC}")
 endif()
@@ -53,8 +54,3 @@ if (NOT TARGET CapnProto::kj-async AND DEFINED CAPNP_LIB_KJ-ASYNC)
   add_library(CapnProto::kj-async SHARED IMPORTED)
   set_target_properties(CapnProto::kj-async PROPERTIES IMPORTED_LOCATION "${CAPNP_LIB_KJ-ASYNC}")
 endif()
-
-cmake_push_check_state()
-set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${CAPNP_INCLUDE_DIRS})
-check_include_file_cxx("kj/filesystem.h" HAVE_KJ_FILESYSTEM)
-cmake_pop_check_state()
diff --git a/include/mp/proxy-io.h b/include/mp/proxy-io.h
index 1f3b4ccb..b0deeb4b 100644
--- a/include/mp/proxy-io.h
+++ b/include/mp/proxy-io.h
@@ -312,7 +312,7 @@ class Connection
         // to the EventLoop TaskSet to avoid "Promise callback destroyed itself"
         // error in cases where f deletes this Connection object.
         m_on_disconnect.add(m_network.onDisconnect().then(
-            kj::mvCapture(f, [this](F&& f) { m_loop.m_task_set->add(kj::evalLater(kj::mv(f))); })));
+            [this, f = std::move(f)]() mutable { m_loop.m_task_set->add(kj::evalLater(kj::mv(f))); }));
     }
 
     EventLoop& m_loop;
@@ -547,11 +547,11 @@ template <typename InitInterface, typename InitImpl>
 void _Listen(EventLoop& loop, kj::Own<kj::ConnectionReceiver>&& listener, InitImpl& init)
 {
     auto* ptr = listener.get();
-    loop.m_task_set->add(ptr->accept().then(kj::mvCapture(kj::mv(listener),
-        [&loop, &init](kj::Own<kj::ConnectionReceiver>&& listener, kj::Own<kj::AsyncIoStream>&& stream) {
+    loop.m_task_set->add(ptr->accept().then(
+        [&loop, &init, listener = kj::mv(listener)](kj::Own<kj::AsyncIoStream>&& stream) mutable {
             _Serve<InitInterface>(loop, kj::mv(stream), init);
             _Listen<InitInterface>(loop, kj::mv(listener), init);
-        })));
+        }));
 }
 
 //! Given stream file descriptor and an init object, handle requests on the
diff --git a/include/mp/proxy-types.h b/include/mp/proxy-types.h
index f41ae58e..38170d8c 100644
--- a/include/mp/proxy-types.h
+++ b/include/mp/proxy-types.h
@@ -102,7 +102,7 @@ void CustomBuildField(TypeList<>,
 template <typename T, typename U>
 kj::Promise<U> JoinPromises(kj::Promise<T>&& prom1, kj::Promise<U>&& prom2)
 {
-    return prom1.then(kj::mvCapture(prom2, [](kj::Promise<U> prom2) { return prom2; }));
+    return prom1.then([prom2 = kj::mv(prom2)]() mutable { return kj::mv(prom2); });
 }
 
 //! PassField override for mp.Context arguments. Return asynchronously and call
@@ -118,10 +118,10 @@ auto PassField(Priority<1>, TypeList<>, ServerContext& server_context, const Fn&
     auto future = kj::newPromiseAndFulfiller<typename ServerContext::CallContext>();
     auto& server = server_context.proxy_server;
     int req = server_context.req;
-    auto invoke = MakeAsyncCallable(kj::mvCapture(future.fulfiller,
-        kj::mvCapture(server_context.call_context,
-            [&server, req, fn, args...](typename ServerContext::CallContext call_context,
-                kj::Own<kj::PromiseFulfiller<typename ServerContext::CallContext>> fulfiller) {
+    auto invoke = MakeAsyncCallable(
+        [&server, req, fn, args...,
+         fulfiller = kj::mv(future.fulfiller),
+         call_context = kj::mv(server_context.call_context)]() mutable {
                 const auto& params = call_context.getParams();
                 Context::Reader context_arg = Accessor::get(params);
                 ServerContext server_context{server, call_context, req};
@@ -155,7 +155,7 @@ auto PassField(Priority<1>, TypeList<>, ServerContext& server_context, const Fn&
                         fulfiller_dispose->reject(kj::mv(*exception));
                     });
                 }
-            })));
+            });
 
     auto thread_client = context_arg.getThread();
     return JoinPromises(server.m_context.connection->m_threads.getLocalServer(thread_client)
diff --git a/src/mp/gen.cpp b/src/mp/gen.cpp
index a027ab33..22212629 100644
--- a/src/mp/gen.cpp
+++ b/src/mp/gen.cpp
@@ -126,7 +126,9 @@ bool BoxedType(const ::capnp::Type& type)
 void Generate(kj::StringPtr src_prefix,
     kj::StringPtr include_prefix,
     kj::StringPtr src_file,
-    kj::ArrayPtr<const kj::StringPtr> import_paths)
+    const std::vector<kj::StringPtr>& import_paths,
+    const kj::ReadableDirectory& src_dir,
+    const std::vector<kj::Own<const kj::ReadableDirectory>>& import_dirs)
 {
     std::string output_path;
     if (src_prefix == ".") {
@@ -176,7 +178,11 @@ void Generate(kj::StringPtr src_prefix,
     }
 
     capnp::SchemaParser parser;
-    auto file_schema = parser.parseDiskFile(src_file, src_file, import_paths);
+    auto directory_pointers = kj::heapArray<const kj::ReadableDirectory*>(import_dirs.size());
+    for (size_t i = 0; i < import_dirs.size(); ++i) {
+        directory_pointers[i] = import_dirs[i].get();
+    }
+    auto file_schema = parser.parseFromDirectory(src_dir, kj::Path::parse(output_path), directory_pointers);
 
     std::ofstream cpp_server(output_path + ".proxy-server.c++");
     cpp_server << "// Generated by " PROXY_BIN " from " << src_file << "\n\n";
@@ -611,20 +617,30 @@ int main(int argc, char** argv)
         exit(1);
     }
     std::vector<kj::StringPtr> import_paths;
-#ifdef HAVE_KJ_FILESYSTEM
+    std::vector<kj::Own<const kj::ReadableDirectory>> import_dirs;
     auto fs = kj::newDiskFilesystem();
     auto cwd = fs->getCurrentPath();
-#endif
+    kj::Own<const kj::ReadableDirectory> src_dir;
+    KJ_IF_MAYBE(dir, fs->getRoot().tryOpenSubdir(cwd.evalNative(argv[1]))) {
+        src_dir = kj::mv(*dir);
+    } else {
+        throw std::runtime_error(std::string("Failed to open src_prefix prefix directory: ") + argv[1]);
+    }
     for (size_t i = 4; i < argc; ++i) {
-        import_paths.emplace_back(argv[i]);
+        KJ_IF_MAYBE(dir, fs->getRoot().tryOpenSubdir(cwd.evalNative(argv[i]))) {
+            import_paths.emplace_back(argv[i]);
+            import_dirs.emplace_back(kj::mv(*dir));
+        } else {
+            throw std::runtime_error(std::string("Failed to open import directory: ") + argv[i]);
+        }
     }
     for (const char* path : {CMAKE_INSTALL_PREFIX "/include", capnp_PREFIX "/include"}) {
-#ifdef HAVE_KJ_FILESYSTEM
-        KJ_IF_MAYBE(dir, fs->getRoot().tryOpenSubdir(cwd.evalNative(path))) { import_paths.emplace_back(path); }
-#else
-        import_paths.emplace_back(path);
-#endif
+        KJ_IF_MAYBE(dir, fs->getRoot().tryOpenSubdir(cwd.evalNative(path))) {
+            import_paths.emplace_back(path);
+            import_dirs.emplace_back(kj::mv(*dir));
+        }
+        // No exception thrown if _PREFIX directories do not exist
     }
-    Generate(argv[1], argv[2], argv[3], {import_paths.data(), import_paths.size()});
+    Generate(argv[1], argv[2], argv[3], import_paths, *src_dir, import_dirs);
     return 0;
 }