diff --git a/src/SPC/builder/unix/library/ncurses.php b/src/SPC/builder/unix/library/ncurses.php
index cb8c10df..5e1de86f 100644
--- a/src/SPC/builder/unix/library/ncurses.php
+++ b/src/SPC/builder/unix/library/ncurses.php
@@ -10,13 +10,26 @@ use SPC\util\SPCTarget;
 
 trait ncurses
 {
+    public function patchBeforeBuild(): bool
+    {
+        // MKlib_gen.sh feeds preprocessor stdout through a sed/awk pipeline into lib_gen.c.
+        // zig-cc/clang leaks the "N warning(s) generated." summary onto stdout (not stderr),
+        // and that line ends up as invalid C in the generated source. Filter it out of the pipe.
+        FileSystem::replaceFileStr(
+            $this->source_dir . '/ncurses/base/MKlib_gen.sh',
+            '$preprocessor $TMP 2>/dev/null \\',
+            "\$preprocessor \$TMP 2>/dev/null \\\n| grep -v ' generated\\.\$' \\",
+        );
+        return true;
+    }
+
     protected function build(): void
     {
         $filelist = FileSystem::scanDirFiles(BUILD_BIN_PATH, relative: true);
 
         UnixAutoconfExecutor::create($this)
             ->appendEnv([
-                'CFLAGS' => '-std=c17',
+                'CFLAGS' => '-std=c17 -w',
                 'LDFLAGS' => SPCTarget::isStatic() ? '-static' : '',
             ])
             ->configure(
diff --git a/src/SPC/builder/unix/library/unixodbc.php b/src/SPC/builder/unix/library/unixodbc.php
index da1fc88d..68f2b91d 100644
--- a/src/SPC/builder/unix/library/unixodbc.php
+++ b/src/SPC/builder/unix/library/unixodbc.php
@@ -21,6 +21,14 @@ trait unixodbc
             'Linux' => '/etc',
             default => throw new WrongUsageException('Unsupported OS: ' . PHP_OS_FAMILY),
         };
+        // libltdl is incompatible with -flto (https://bugs.gentoo.org/532672)
+        $stripLto = static fn ($s) => preg_replace('/(^|\s)-flto(=\S+)?(?=\s|$)/', ' ', (string) $s);
+        $origC = $this->builder->arch_c_flags;
+        $origCxx = $this->builder->arch_cxx_flags;
+        $origLd = $this->builder->arch_ld_flags;
+        $this->builder->arch_c_flags = clean_spaces($stripLto($origC));
+        $this->builder->arch_cxx_flags = clean_spaces($stripLto($origCxx));
+        $this->builder->arch_ld_flags = clean_spaces($stripLto($origLd));
         $make = UnixAutoconfExecutor::create($this)
             ->configure(
                 '--disable-debug',
@@ -37,6 +45,10 @@ trait unixodbc
         );
 
         $make->make();
+        $this->builder->arch_c_flags = $origC;
+        $this->builder->arch_cxx_flags = $origCxx;
+        $this->builder->arch_ld_flags = $origLd;
+
         $pkgConfigs = ['odbc.pc', 'odbccr.pc', 'odbcinst.pc'];
         $this->patchPkgconfPrefix($pkgConfigs);
         foreach ($pkgConfigs as $file) {
diff --git a/src/SPC/store/pkg/GoXcaddy.php b/src/SPC/store/pkg/GoXcaddy.php
index 462342db..b4981ad9 100644
--- a/src/SPC/store/pkg/GoXcaddy.php
+++ b/src/SPC/store/pkg/GoXcaddy.php
@@ -85,7 +85,7 @@ class GoXcaddy extends CustomPackage
                 'GOBIN' => "{$pkgroot}/go-xcaddy/bin",
                 'GOPATH' => "{$pkgroot}/go",
             ])
-            ->exec('CC=cc go install github.com/caddyserver/xcaddy/cmd/xcaddy@latest');
+            ->exec('CGO_ENABLED=0 go install github.com/caddyserver/xcaddy/cmd/xcaddy@latest');
     }
 
     public static function getEnvironment(): array
diff --git a/src/SPC/toolchain/ClangNativeToolchain.php b/src/SPC/toolchain/ClangNativeToolchain.php
index a57b2e8b..17bd8ad7 100644
--- a/src/SPC/toolchain/ClangNativeToolchain.php
+++ b/src/SPC/toolchain/ClangNativeToolchain.php
@@ -21,6 +21,7 @@ class ClangNativeToolchain implements ToolchainInterface
         GlobalEnvManager::putenv('SPC_LINUX_DEFAULT_CC=clang');
         GlobalEnvManager::putenv('SPC_LINUX_DEFAULT_CXX=clang++');
         GlobalEnvManager::putenv('SPC_LINUX_DEFAULT_AR=ar');
+        GlobalEnvManager::putenv('SPC_LINUX_DEFAULT_RANLIB=ranlib');
         GlobalEnvManager::putenv('SPC_LINUX_DEFAULT_LD=ld');
     }
 
diff --git a/src/SPC/toolchain/GccNativeToolchain.php b/src/SPC/toolchain/GccNativeToolchain.php
index d8eb8d1a..4da3e398 100644
--- a/src/SPC/toolchain/GccNativeToolchain.php
+++ b/src/SPC/toolchain/GccNativeToolchain.php
@@ -18,6 +18,7 @@ class GccNativeToolchain implements ToolchainInterface
         GlobalEnvManager::putenv('SPC_LINUX_DEFAULT_CC=gcc');
         GlobalEnvManager::putenv('SPC_LINUX_DEFAULT_CXX=g++');
         GlobalEnvManager::putenv('SPC_LINUX_DEFAULT_AR=ar');
+        GlobalEnvManager::putenv('SPC_LINUX_DEFAULT_RANLIB=ranlib');
         GlobalEnvManager::putenv('SPC_LINUX_DEFAULT_LD=ld');
     }