diff --git a/util/build.c b/util/build.c
index 96601da..cccbade 100644
--- a/util/build.c
+++ b/util/build.c
@@ -696,220 +696,6 @@ bool AddCompilerToPath() {
 	return true;
 }
 
-void BuildCrossCompiler() {
-	if (!CallSystem("whoami | grep root")) {
-		printf("Error: Build should not be run as root.\n");
-		exit(0);
-	}
-
-	{
-		printf("\n");
-		printf("To build Essence, you need a cross compiler. This will be built for you automatically.\n");
-		printf("- You need to be connected to the internet. ~100MB will be downloaded.\n");
-		printf("- You need ~3GB of drive space available.\n");
-		printf("- You need ~8GB of RAM available.\n");
-		printf("- This should take ~20 minutes on a modern computer.\n");
-		printf("- This does *not* require root permissions.\n");
-		printf("- You must fully update your system before building.\n\n");
-
-		bool missingPackages = false;
-		bool missingLibraries = false;
-
-		if (CallSystem("which g++ > /dev/null 2>&1")) { printf("Error: Missing GCC/G++.\n"); missingPackages = true; }
-		if (CallSystem("which make > /dev/null 2>&1")) { printf("Error: Missing GNU Make.\n"); missingPackages = true; }
-		if (CallSystem("which bison > /dev/null 2>&1")) { printf("Error: Missing GNU Bison.\n"); missingPackages = true; }
-		if (CallSystem("which flex > /dev/null 2>&1")) { printf("Error: Missing Flex.\n"); missingPackages = true; }
-		if (CallSystem("which curl > /dev/null 2>&1")) { printf("Error: Missing curl.\n"); missingPackages = true; }
-		if (CallSystem("which nasm > /dev/null 2>&1")) { printf("Error: Missing nasm.\n"); missingPackages = true; }
-		if (CallSystem("which ctags > /dev/null 2>&1")) { printf("Error: Missing ctags.\n"); missingPackages = true; }
-		if (CallSystem("which xz > /dev/null 2>&1")) { printf("Error: Missing xz.\n"); missingPackages = true; }
-		if (CallSystem("which gzip > /dev/null 2>&1")) { printf("Error: Missing gzip.\n"); missingPackages = true; }
-		if (CallSystem("which tar > /dev/null 2>&1")) { printf("Error: Missing tar.\n"); missingPackages = true; }
-		if (CallSystem("which grep > /dev/null 2>&1")) { printf("Error: Missing grep.\n"); missingPackages = true; }
-		if (CallSystem("which sed > /dev/null 2>&1")) { printf("Error: Missing sed.\n"); missingPackages = true; }
-		if (CallSystem("which awk > /dev/null 2>&1")) { printf("Error: Missing awk.\n"); missingPackages = true; }
-
-#ifdef __APPLE__
-		if (CallSystem("gcc -L/opt/homebrew/lib -lmpc 2>&1 | grep -i undefined > /dev/null")) { printf("Error: Missing GNU MPC.\n"); missingLibraries = true; }
-		if (CallSystem("gcc -L/opt/homebrew/lib -lmpfr 2>&1 | grep -i undefined > /dev/null")) { printf("Error: Missing GNU MPFR.\n"); missingLibraries = true; }
-		if (CallSystem("gcc -L/opt/homebrew/lib -lgmp 2>&1 | grep -i undefined > /dev/null")) { printf("Error: Missing GNU GMP.\n"); missingLibraries = true; }
-#else
-		if (CallSystem("gcc -lmpc 2>&1 | grep -i undefined > /dev/null")) { printf("Error: Missing GNU MPC.\n"); missingLibraries = true; }
-		if (CallSystem("gcc -lmpfr 2>&1 | grep -i undefined > /dev/null")) { printf("Error: Missing GNU MPFR.\n"); missingLibraries = true; }
-		if (CallSystem("gcc -lgmp 2>&1 | grep -i undefined > /dev/null")) { printf("Error: Missing GNU GMP.\n"); missingLibraries = true; }
-#endif
-
-		if (missingPackages || missingLibraries) {
-			if (missingLibraries) {
-				printf("Make sure you install the *development* versions of MPC, MPFR and GMP.\n"
-						"Depending on your package manager, you might have to suffix the package name with \"-dev\" or \"-devel\".\n"
-						"For example, on Ubuntu, you can run: \"apt-get install libgmp-dev libmpc-dev libmpfr.dev\".\n");
-			}
-
-			exit(0);
-		}
-
-		char installationFolder[4096];
-		char sysrootFolder[4096];
-
-		int processorCount = sysconf(_SC_NPROCESSORS_CONF);
-		if (processorCount < 1) processorCount = 1;
-		if (processorCount > 16) processorCount = 16;
-
-		printf("Type 'yes' if you have updated your system.\n");
-		if (interactiveMode && !GetYes()) { printf("The build has been canceled.\n"); exit(0); }
-
-		{
-			getcwd(installationFolder, 4096);
-			strcat(installationFolder, "/cross");
-			getcwd(sysrootFolder, 4096);
-			strcat(sysrootFolder, "/root");
-			strcpy(compilerPath, installationFolder);
-			strcat(compilerPath, "/bin");
-			printf("\nType 'yes' to install the compiler into '%s'.\n", installationFolder);
-			if (interactiveMode && !GetYes()) { printf("The build has been canceled.\n"); exit(0); }
-		}
-
-		if (!AddCompilerToPath()) {
-			goto fail;
-		}
-
-		{
-			FILE *f = fopen("bin/running_makefiles", "r");
-
-			if (f) {
-				fclose(f);
-				printf("\nThe build system has detected a build was started, but was not completed.\n");
-				printf("Type 'yes' to attempt to resume this build.\n");
-
-				if (GetYes()) {
-					printf("Resuming build...\n");
-					StartSpinner();
-					goto runMakefiles;
-				}
-			}
-		}
-
-		CallSystemF("echo \"Started build of cross compiler index %d, with GCC " GCC_VERSION " and Binutils " BINUTILS_VERSION ". Using %d processors.\" > bin/build_cross.log", 
-				CROSS_COMPILER_INDEX, processorCount);
-
-		CallSystem("rm -rf cross bin/build-binutils bin/build-gcc bin/gcc-" GCC_VERSION " bin/binutils-" BINUTILS_VERSION);
-
-		{
-			CallSystem("echo Preparing C standard library headers... >> bin/build_cross.log");
-			CallSystem("mkdir -p root/" SYSTEM_FOLDER_NAME " root/Applications/POSIX/include root/Applications/POSIX/lib root/Applications/POSIX/bin");
-			CallSystem("ports/musl/build.sh " TARGET_NAME ">> bin/build_cross.log 2>&1");
-		}
-
-		printf("Downloading and extracting source...\n");
-
-		if (CallSystem("ports/gcc/port.sh download-only")) {
-			goto fail;
-		}
-
-		printf("Building GCC...\n");
-		StartSpinner();
-
-		{
-			CallSystem("echo Running configure... >> bin/build_cross.log");
-			if (CallSystem("mkdir bin/build-binutils")) goto fail;
-			if (CallSystem("mkdir bin/build-gcc")) goto fail;
-			if (chdir("bin/build-binutils")) goto fail;
-			if (CallSystemF("../binutils-src/configure --target=" TOOLCHAIN_PREFIX " --prefix=\"%s\" --with-sysroot=%s --disable-nls --disable-werror >> ../build_cross.log 2>&1", 
-						installationFolder, sysrootFolder)) goto fail;
-			if (chdir("../..")) goto fail;
-			if (chdir("bin/build-gcc")) goto fail;
-			// Add --without-headers for a x86_64-elf build.
-			if (CallSystemF("../gcc-src/configure --target=" TOOLCHAIN_PREFIX " --prefix=\"%s\" --enable-languages=c,c++ --with-sysroot=%s --disable-nls >> ../build_cross.log 2>&1", 
-						installationFolder, sysrootFolder)) goto fail;
-			if (chdir("../..")) goto fail;
-		}
-
-		runMakefiles:;
-
-		{
-			CallSystem("touch bin/running_makefiles");
-
-			CallSystem("echo Building Binutils... >> bin/build_cross.log");
-			if (chdir("bin/build-binutils")) goto fail;
-			if (CallSystemF("make -j%d >> ../build_cross.log 2>&1", processorCount)) goto fail;
-			if (CallSystem("make install >> ../build_cross.log 2>&1")) goto fail;
-			if (chdir("../..")) goto fail;
-
-			CallSystem("echo Building GCC... >> bin/build_cross.log");
-			if (chdir("bin/build-gcc")) goto fail;
-			if (CallSystemF("make all-gcc -j%d >> ../build_cross.log 2>&1", processorCount)) goto fail;
-			if (CallSystem("make all-target-libgcc >> ../build_cross.log 2>&1")) goto fail;
-			if (CallSystem("make install-gcc >> ../build_cross.log 2>&1")) goto fail;
-			if (CallSystem("make install-target-libgcc >> ../build_cross.log 2>&1")) goto fail;
-			if (chdir("../..")) goto fail;
-		}
-
-		{
-			CallSystem("echo Removing debug symbols... >> bin/build_cross.log");
-			CallSystemF("strip %s/bin/* >> bin/build_cross.log 2>&1", installationFolder);
-			CallSystemF("strip %s/libexec/gcc/" TOOLCHAIN_PREFIX "/" GCC_VERSION "/* >> bin/build_cross.log 2>&1", installationFolder);
-		}
-
-		{
-			CallSystem("echo Modifying headers... >> bin/build_cross.log");
-			char path[65536];
-			sprintf(path, "%s/lib/gcc/" TOOLCHAIN_PREFIX "/" GCC_VERSION "/include/mm_malloc.h", installationFolder);
-			FILE *file = fopen(path, "w");
-			if (!file) {
-				printf("Couldn't modify header files\n");
-				goto fail;
-			} else {
-				fprintf(file, "/*Removed*/\n");
-				fclose(file);
-			}
-		}
-
-		StopSpinner();
-
-		{
-			BuildUtilities();
-
-			if (!BuildAPIDependencies()) {
-				goto fail;
-			}
-
-			FILE *f = fopen("bin/build.ini", "wb");
-			OutputStartOfBuildINI(f, false);
-			fprintf(f, "[general]\nwithout_kernel=1\n");
-			fclose(f);
-			if (CallSystem("bin/build_core standard bin/build.ini")) goto fail;
-		}
-
-		StartSpinner();
-
-		{
-			if (chdir("bin/build-gcc")) goto fail;
-			if (CallSystemF("make -j%d all-target-libstdc++-v3 >> ../build_cross.log 2>&1", processorCount)) goto fail;
-			if (CallSystem("make install-target-libstdc++-v3 >> ../build_cross.log 2>&1")) goto fail;
-			if (chdir("../..")) goto fail;
-		}
-
-		{
-			CallSystem("echo Cleaning up... >> bin/build_cross.log");
-			CallSystem("rm -rf bin/binutils-src bin/gcc-src bin/gmp-src bin/mpc-src bin/mpfr-src");
-			CallSystem("rm -rf bin/build-binutils bin/build-gcc");
-			CallSystem("rm bin/running_makefiles");
-		}
-
-		StopSpinner();
-
-		printf(ColorHighlight "\nThe cross compiler has built successfully.\n" ColorNormal);
-		foundValidCrossCompiler = true;
-	}
-
-	return;
-	fail:;
-	StopSpinner();
-	printf("\nThe build has failed. A log is available in " ColorHighlight "bin/build_cross.log" ColorNormal ".\n");
-	exit(0);
-}
-
 void SaveConfig() {
 	FILE *f = fopen("bin/build_config.ini", "wb");
 	fprintf(f, "accepted_license=%d\ncompiler_path=%s\n"
@@ -1353,8 +1139,7 @@ void DoCommand(const char *l) {
 		LoadOptions();
 		Compile(COMPILE_FOR_EMULATOR, atoi(GetOptionString("Emulator.PrimaryDriveMB")), NULL);
 	} else if (0 == strcmp(l, "build-cross")) {
-		BuildCrossCompiler();
-		SaveConfig();
+		CallSystem("bin/script util/build_gcc.script");
 		printf("Please restart the build system.\n");
 		exit(0);
 	} else if (0 == strcmp(l, "build-utilities") || 0 == strcmp(l, "u")) {
@@ -1750,8 +1535,8 @@ void DoCommand(const char *l) {
 		DoCommand("setup-pre-built-toolchain");
 		AddCompilerToPath();
 #else
-		BuildCrossCompiler();
-		SaveConfig();
+		CallSystem("bin/script util/build_gcc.script");
+		exit(0);
 #endif
 	} else if (0 == strcmp(l, "help") || 0 == strcmp(l, "h") || 0 == strcmp(l, "?")) {
 		printf(ColorHighlight "\n=== Common Commands ===\n" ColorNormal);
diff --git a/util/script.c b/util/script.c
index 57ff133..7870956 100644
--- a/util/script.c
+++ b/util/script.c
@@ -34,7 +34,6 @@
 #include <stdbool.h>
 
 #define T_ERROR               (0)
-
 #define T_EOF                 (1)
 #define T_IDENTIFIER          (2)
 #define T_STRING_LITERAL      (3)
@@ -321,47 +320,62 @@ void *FileLoad(const char *path, size_t *length);
 
 // --------------------------------- Base module.
 
-#define BASE_MODULE_SOURCE \
-	"void PrintStdErr(str x) #extcall;" \
-	"void PrintStdErrWarning(str x) #extcall;" \
-	"void PrintStdErrHighlight(str x) #extcall;" \
-	"str ConsoleGetLine() #extcall;" \
-	"str StringTrim(str x) #extcall;" \
-	"int StringToByte(str x) #extcall;" \
-	"bool SystemShellExecute(str x) #extcall;" /* Returns true on success. */ \
-	"bool SystemShellExecuteWithWorkingDirectory(str wd, str x) #extcall;" /* Returns true on success. */ \
-	"str SystemShellEvaluate(str x) #extcall;" \
-	"int SystemGetProcessorCount() #extcall;" \
-	"str SystemGetEnvironmentVariable(str name) #extcall;" \
-	"bool SystemSetEnvironmentVariable(str name, str value) #extcall;" \
-	"bool PathExists(str x) #extcall;" \
-	"bool PathCreateDirectory(str x) #extcall;" /* TODO Replace the return value with a enum. */ \
-	"bool PathDelete(str x) #extcall;" /* TODO Replace the return value with a enum. */ \
-	"bool PathDeleteRecursively(str x) #extcall;" \
-	"bool PathMove(str source, str destination) #extcall;" \
-	"str PathGetDefaultPrefix() #extcall;" \
-	"bool PathSetDefaultPrefixToScriptSourceDirectory() #extcall;" \
-	"str FileReadAll(str path) #extcall;" /* TODO Returning an error? */ \
-	"bool FileWriteAll(str path, str x) #extcall;" /* TODO Returning an error? */ \
-	"bool FileCopy(str source, str destination) #extcall;" \
-	"bool PersistRead(str path) #extcall;" \
-	\
-	"bool StringContains(str haystack, str needle) {" \
-	"	for int i = 0; i <= haystack:len() - needle:len(); i += 1 {" \
-	"		bool match = true;" \
-	"		for int j = 0; j < needle:len(); j += 1 { if haystack[i + j] != needle[j] match = false; }" \
-	"		if match { return true; }" \
-	"	}" \
-	"" \
-	"	return false;" \
-	"}" \
-	""\
-	"bool CharacterIsAlnum(str c) {" \
-	"	int b = StringToByte(c);" \
-	"	return (b >= StringToByte(\"A\") && b <= StringToByte(\"Z\")) || (b >= StringToByte(\"a\") && b <= StringToByte(\"z\"))" \
-	"		|| (b >= StringToByte(\"0\") && b <= StringToByte(\"9\"));" \
-	"}" \
+char baseModuleSource[] = {
+	// Logging:
 
+	"void PrintStdErr(str x) #extcall;"
+	"void PrintStdErrWarning(str x) #extcall;"
+	"void PrintStdErrHighlight(str x) #extcall;"
+
+	// String operations:
+
+	"str StringTrim(str x) #extcall;"
+	"int StringToByte(str x) #extcall;"
+	"bool StringContains(str haystack, str needle) {"
+	"	for int i = 0; i <= haystack:len() - needle:len(); i += 1 {"
+	"		bool match = true;"
+	"		for int j = 0; j < needle:len(); j += 1 { if haystack[i + j] != needle[j] match = false; }"
+	"		if match { return true; }"
+	"	}"
+	""
+	"	return false;"
+	"}"
+	"bool CharacterIsAlnum(str c) {"
+	"	int b = StringToByte(c);"
+	"	return (b >= StringToByte(\"A\") && b <= StringToByte(\"Z\")) || (b >= StringToByte(\"a\") && b <= StringToByte(\"z\"))"
+	"		|| (b >= StringToByte(\"0\") && b <= StringToByte(\"9\"));"
+	"}"
+
+	// Miscellaneous:
+
+	"int SystemGetProcessorCount() #extcall;"
+
+	// File system access:
+
+	"bool PathExists(str x) #extcall;"
+	"bool PathCreateDirectory(str x) #extcall;" // TODO Replace the return value with a enum.
+	"bool PathDelete(str x) #extcall;" // TODO Replace the return value with a enum.
+	"bool PathDeleteRecursively(str x) #extcall;"
+	"bool PathMove(str source, str destination) #extcall;"
+	"str PathGetDefaultPrefix() #extcall;"
+	"bool PathSetDefaultPrefixToScriptSourceDirectory() #extcall;"
+	"str FileReadAll(str path) #extcall;" // TODO Returning an error?
+	"bool FileWriteAll(str path, str x) #extcall;" // TODO Returning an error?
+	"bool FileCopy(str source, str destination) #extcall;"
+
+	// Persistent variables:
+
+	"bool PersistRead(str path) #extcall;"
+
+	// Command line:
+
+	"str ConsoleGetLine() #extcall;"
+	"str SystemGetEnvironmentVariable(str name) #extcall;"
+	"bool SystemSetEnvironmentVariable(str name, str value) #extcall;"
+	"bool SystemShellExecute(str x) #extcall;" // Returns true on success.
+	"bool SystemShellExecuteWithWorkingDirectory(str wd, str x) #extcall;" // Returns true on success.
+	"str SystemShellEvaluate(str x) #extcall;"
+};
 
 // --------------------------------- External function calls.
 
@@ -1631,8 +1645,8 @@ bool ASTSetScopes(Tokenizer *tokenizer, ExecutionContext *context, Node *node, S
 
 			if (node->firstChild->token.textBytes == 15 
 					&& 0 == MemoryCompare(node->firstChild->token.text, "__base_module__", node->firstChild->token.textBytes)) {
-				fileData = BASE_MODULE_SOURCE;
-				t.inputBytes = sizeof(BASE_MODULE_SOURCE) - 1;
+				fileData = baseModuleSource;
+				t.inputBytes = sizeof(baseModuleSource) - 1;
 				t.isBaseModule = true;
 			} else {
 				fileData = FileLoad(path, &t.inputBytes);