diff --git a/ecsact/cli/commands/build/recipe/BUILD.bazel b/ecsact/cli/commands/build/recipe/BUILD.bazel
index d6a491b..66127da 100644
--- a/ecsact/cli/commands/build/recipe/BUILD.bazel
+++ b/ecsact/cli/commands/build/recipe/BUILD.bazel
@@ -48,6 +48,7 @@ cc_library(
         "//ecsact/cli/detail:download",
         "//ecsact/cli/detail:glob",
         "//ecsact/cli/detail:archive",
+        "//ecsact/cli/detail:long_path_workaround",
         "//ecsact/cli/commands/build:build_recipe",
         "//ecsact/cli/commands/build:cc_compiler_config",
         "//ecsact/cli/commands/build:cc_defines_gen",
diff --git a/ecsact/cli/commands/build/recipe/cook.cc b/ecsact/cli/commands/build/recipe/cook.cc
index 104e26c..8af7a46 100644
--- a/ecsact/cli/commands/build/recipe/cook.cc
+++ b/ecsact/cli/commands/build/recipe/cook.cc
@@ -24,6 +24,7 @@
 #include "ecsact/cli/detail/download.hh"
 #include "ecsact/cli/detail/glob.hh"
 #include "ecsact/cli/detail/archive.hh"
+#include "ecsact/cli/detail/long_path_workaround.hh"
 #ifndef ECSACT_CLI_USE_SDK_VERSION
 #	include "tools/cpp/runfiles/runfiles.h"
 #endif
@@ -34,6 +35,7 @@ using ecsact::cli::report_warning;
 using ecsact::cli::detail::download_file;
 using ecsact::cli::detail::expand_path_globs;
 using ecsact::cli::detail::integrity;
+using ecsact::cli::detail::long_path_workaround;
 using ecsact::cli::detail::path_before_glob;
 using ecsact::cli::detail::path_matches_glob;
 using ecsact::cli::detail::path_strip_prefix;
@@ -286,6 +288,8 @@ static auto handle_source( //
 		src_path = (base_directory / src_path).lexically_normal();
 	}
 
+	src_path = long_path_workaround(src_path);
+
 	auto outdir = src.outdir //
 		? options.work_dir / *src.outdir
 		: options.work_dir;
@@ -490,6 +494,10 @@ auto clang_gcc_compile(compile_options options) -> int {
 			continue;
 		}
 
+		if(src.extension().string() == ".ipp") {
+			continue;
+		}
+
 		compile_proc_args.push_back(fs::relative(src, options.work_dir).string());
 	}
 
@@ -630,6 +638,10 @@ auto cl_compile(compile_options options) -> int {
 			continue;
 		}
 
+		if(src.extension().string() == ".ipp") {
+			continue;
+		}
+
 		cl_args.push_back(abs_from_wd(src).string());
 	}
 
diff --git a/ecsact/cli/commands/recipe-bundle/BUILD.bazel b/ecsact/cli/commands/recipe-bundle/BUILD.bazel
index 6b4b21d..d81dcba 100644
--- a/ecsact/cli/commands/recipe-bundle/BUILD.bazel
+++ b/ecsact/cli/commands/recipe-bundle/BUILD.bazel
@@ -16,6 +16,7 @@ cc_library(
         "//ecsact/cli/commands/codegen",
         "//ecsact/cli/commands/build:build_recipe",
         "//ecsact/cli/detail:download",
+        "//ecsact/cli/detail:long_path_workaround",
         "//ecsact/cli:report",
     ],
 )
diff --git a/ecsact/cli/commands/recipe-bundle/build_recipe_bundle.cc b/ecsact/cli/commands/recipe-bundle/build_recipe_bundle.cc
index 493849e..79a698c 100644
--- a/ecsact/cli/commands/recipe-bundle/build_recipe_bundle.cc
+++ b/ecsact/cli/commands/recipe-bundle/build_recipe_bundle.cc
@@ -7,6 +7,7 @@
 #include <filesystem>
 #include <fstream>
 #include <vector>
+#include <cerrno>
 #include <span>
 #include <ratio>
 #include <cstddef>
@@ -18,11 +19,13 @@
 #include <archive.h>
 #include <archive_entry.h>
 #include "xxhash.h"
-
 #include "ecsact/cli/report.hh"
 #include "ecsact/cli/detail/download.hh"
+#include "ecsact/cli/detail/long_path_workaround.hh"
 #include "ecsact/cli/commands/codegen/codegen_util.hh"
 
+using ecsact::cli::detail::long_path_workaround;
+
 using namespace std::string_literals;
 using namespace std::string_view_literals;
 namespace fs = std::filesystem;
@@ -87,7 +90,7 @@ static auto is_valid_bundle_entry_path(std::string_view path) -> bool {
 
 static auto read_file(fs::path path) -> std::optional<std::vector<std::byte>> {
 	auto ec = std::error_code{};
-	auto file_size = fs::file_size(path, ec);
+	auto file_size = fs::file_size(long_path_workaround(path), ec);
 	if(ec) {
 		ecsact::cli::report_error(
 			"failed to read file size {}: {}",
@@ -96,7 +99,7 @@ static auto read_file(fs::path path) -> std::optional<std::vector<std::byte>> {
 		);
 		return {};
 	}
-	auto file = std::ifstream{path, std::ios_base::binary};
+	auto file = std::ifstream{long_path_workaround(path), std::ios_base::binary};
 	if(!file) {
 		ecsact::cli::report_error(
 			"failed to open file file for reading {}",
@@ -117,15 +120,46 @@ static auto read_file(fs::path path) -> std::optional<std::vector<std::byte>> {
 	return file_buffer;
 }
 
-static auto write_file(fs::path path, std::span<std::byte> data) -> void {
-	if(path.has_parent_path()) {
+static auto write_file(fs::path path, std::span<std::byte> data) -> bool {
+	if(path.has_parent_path() && !fs::exists(path.parent_path())) {
 		auto ec = std::error_code{};
-		fs::create_directories(path.parent_path(), ec);
+		fs::create_directories(long_path_workaround(path.parent_path()), ec);
+		if(ec) {
+			ecsact::cli::report_error(
+				"failed to create directory {}: {}",
+				path.generic_string(),
+				ec.message()
+			);
+			return false;
+		}
+	}
+
+	auto file = std::ofstream{
+		long_path_workaround(path),
+		std::ios::binary | std::ios::trunc
+	};
+	if(!file) {
+		ecsact::cli::report_error(
+			"failed to open file {}: {}",
+			path.generic_string(),
+			std::strerror(errno)
+		);
+		return false;
 	}
-	auto file = std::ofstream(path, std::ios_base::binary | std::ios_base::trunc);
-	assert(file);
 
 	file.write(reinterpret_cast<const char*>(data.data()), data.size());
+
+	if(!file) {
+		ecsact::cli::report_error(
+			"failed to write file {}: {}",
+			path.generic_string(),
+			std::strerror(errno)
+		);
+		return false;
+	}
+
+	file.flush();
+	return true;
 }
 
 ecsact::build_recipe_bundle::build_recipe_bundle() = default;
@@ -399,7 +433,11 @@ auto ecsact::build_recipe_bundle::extract( //
 			return std::logic_error{std::format("Failed to read {}", path)};
 		}
 
-		write_file(dir / path, data);
+		if(!write_file(dir / path, data)) {
+			return std::logic_error{
+				std::format("Failed to extract {}", (dir / path).generic_string())
+			};
+		}
 	}
 
 	archive_entry_free(entry);
diff --git a/ecsact/cli/detail/BUILD.bazel b/ecsact/cli/detail/BUILD.bazel
index 1c248b2..6bdd390 100644
--- a/ecsact/cli/detail/BUILD.bazel
+++ b/ecsact/cli/detail/BUILD.bazel
@@ -74,3 +74,10 @@ cc_library(
         "@boost.process",
     ],
 )
+
+cc_library(
+    name = "long_path_workaround",
+    copts = copts,
+    hdrs = ["long_path_workaround.hh"],
+    srcs = ["long_path_workaround.cc"],
+)
diff --git a/ecsact/cli/detail/long_path_workaround.cc b/ecsact/cli/detail/long_path_workaround.cc
new file mode 100644
index 0000000..b241b34
--- /dev/null
+++ b/ecsact/cli/detail/long_path_workaround.cc
@@ -0,0 +1,17 @@
+#include "ecsact/cli/detail/long_path_workaround.hh"
+
+auto ecsact::cli::detail::long_path_workaround( //
+	std::filesystem::path p
+) -> std::filesystem::path {
+#if _WIN32
+	auto win_path_str = "\\\\?\\" + std::filesystem::absolute(p).string();
+	for(auto& c : win_path_str) {
+		if(c == '/') {
+			c = '\\';
+		}
+	}
+	return win_path_str;
+#else
+	return p;
+#endif
+}
diff --git a/ecsact/cli/detail/long_path_workaround.hh b/ecsact/cli/detail/long_path_workaround.hh
new file mode 100644
index 0000000..4cd67ef
--- /dev/null
+++ b/ecsact/cli/detail/long_path_workaround.hh
@@ -0,0 +1,13 @@
+#pragma once
+
+#include <filesystem>
+
+namespace ecsact::cli::detail {
+
+/**
+ * The Ecsact CLI isn't built with long path awareness on Windows. This utility
+ * function returns an absolute //?/ prefixed path on Windows and on other
+ * platforms does nothing.
+ */
+auto long_path_workaround(std::filesystem::path p) -> std::filesystem::path;
+} // namespace ecsact::cli::detail