diff --git a/src/BuildConfig.cc b/src/BuildConfig.cc
index b5cd9bb92..464f3a882 100644
--- a/src/BuildConfig.cc
+++ b/src/BuildConfig.cc
@@ -60,6 +60,8 @@ operator<<(std::ostream& os, VarType type) {
 
 Result<BuildConfig>
 BuildConfig::init(const Manifest& manifest, const bool isDebug) {
+  using std::string_view_literals::operator""sv;
+
   std::string libName;
   if (manifest.package.name.starts_with("lib")) {
     libName = fmt::format("{}.a", manifest.package.name);
diff --git a/src/Cmd/Add.cc b/src/Cmd/Add.cc
index 899b6d640..1b846a273 100644
--- a/src/Cmd/Add.cc
+++ b/src/Cmd/Add.cc
@@ -81,6 +81,8 @@ getDependencyGitUrl(const std::string_view dep) {
 
 static std::string
 getDependencyName(const std::string_view dep) {
+  using std::string_view_literals::operator""sv;
+
   std::string name;
   if (dep.find("://") == std::string_view::npos) {
     name = dep.substr(dep.find_last_of('/') + 1);
diff --git a/src/Cmd/Test.cc b/src/Cmd/Test.cc
index 2c56c18a0..ff9f2ae40 100644
--- a/src/Cmd/Test.cc
+++ b/src/Cmd/Test.cc
@@ -164,6 +164,8 @@ Test::compileTestTargets() {
 
 Result<void>
 Test::runTestTargets() {
+  using std::string_view_literals::operator""sv;
+
   const auto start = std::chrono::steady_clock::now();
 
   std::size_t numPassed = 0;
diff --git a/src/Manifest.cc b/src/Manifest.cc
index 407c543ad..8d6653eda 100644
--- a/src/Manifest.cc
+++ b/src/Manifest.cc
@@ -40,9 +40,6 @@ static const fs::path GIT_SRC_DIR(GIT_DIR / "src");
 static const std::unordered_set<char> ALLOWED_CHARS = {
   '-', '_', '/', '.', '+'  // allowed in the dependency name
 };
-static const std::unordered_set<std::string_view> KEYWORDS = {
-#include "Keywords.def"
-};
 
 Result<Edition>
 Edition::tryFromString(std::string str) noexcept {
@@ -227,8 +224,8 @@ static Result<std::unordered_map<std::string, Profile>>
 parseProfiles(const toml::value& val) noexcept {
   std::unordered_map<std::string, Profile> profiles;
   const BaseProfile baseProfile = Try(parseBaseProfile(val));
-  profiles.insert({ "dev", Try(parseDevProfile(val, baseProfile)) });
-  profiles.insert({ "release", Try(parseReleaseProfile(val, baseProfile)) });
+  profiles.emplace("dev", Try(parseDevProfile(val, baseProfile)));
+  profiles.emplace("release", Try(parseReleaseProfile(val, baseProfile)));
   return Ok(profiles);
 }
 
@@ -550,7 +547,11 @@ validatePackageName(const std::string_view name) noexcept {
       std::isalnum(name[name.size() - 1]),
       "package name must end with a letter or digit"
   );
-  Ensure(!KEYWORDS.contains(name), "package name must not be a C++ keyword");
+
+  static const std::unordered_set<std::string_view> keywords = {
+#include "Keywords.def"
+  };
+  Ensure(!keywords.contains(name), "package name must not be a C++ keyword");
 
   return Ok();
 }
@@ -560,6 +561,7 @@ validatePackageName(const std::string_view name) noexcept {
 #ifdef CABIN_TEST
 
 #  include "Rustify/Tests.hpp"
+#  include "TermColor.hpp"
 
 #  include <climits>
 #  include <fmt/ranges.h>
@@ -1076,6 +1078,8 @@ testValidateDepName() {
 
 int
 main() {
+  cabin::setColorMode("never");
+
   tests::testEditionTryFromString();
   tests::testEditionComparison();
   tests::testPackageTryFromToml();
diff --git a/src/Manifest.hpp b/src/Manifest.hpp
index b3dc06ced..1bd64800d 100644
--- a/src/Manifest.hpp
+++ b/src/Manifest.hpp
@@ -21,7 +21,6 @@
 namespace cabin {
 
 namespace fs = std::filesystem;
-using std::string_view_literals::operator""sv;
 
 struct Edition {
   enum class Year : uint16_t {
diff --git a/src/Rustify/Result.hpp b/src/Rustify/Result.hpp
index 279ea9930..d8172253f 100644
--- a/src/Rustify/Result.hpp
+++ b/src/Rustify/Result.hpp
@@ -1,12 +1,14 @@
 #pragma once
 
-#include <concepts>
+#include "../TermColor.hpp"
+
 #include <exception>
 #include <fmt/core.h>
 #include <memory>
 #include <mitama/anyhow/anyhow.hpp>
 #include <mitama/result/result.hpp>
 #include <string>
+#include <string_view>
 #include <type_traits>
 #include <utility>
 
@@ -57,16 +59,29 @@ namespace toml {
 template <typename T, typename... U>
 inline Result<T>
 try_find(const toml::value& v, const U&... u) noexcept {
-  using namespace std::string_view_literals;  // NOLINT
+  using std::string_view_literals::operator""sv;
+
+  if (cabin::shouldColorStderr()) {
+    color::enable();
+  } else {
+    color::disable();
+  }
 
   try {
     return Ok(toml::find<T>(v, u...));
   } catch (const std::exception& e) {
     std::string what = e.what();
-    // TODO: make the same fix on upstream
-    if (what.starts_with("[error] ")) {
-      what = what.substr("[error] "sv.size());
+
+    static constexpr std::size_t errorPrefixSize = "[error] "sv.size();
+    static constexpr std::size_t colorErrorPrefixSize =
+        "\033[31m\033[01m[error]\033[00m "sv.size();
+
+    if (cabin::shouldColorStderr()) {
+      what = what.substr(colorErrorPrefixSize);
+    } else {
+      what = what.substr(errorPrefixSize);
     }
+
     if (what.back() == '\n') {
       what.pop_back();  // remove the last '\n' since logger::error adds one.
     }