diff --git a/apps/script_console.cpp b/apps/script_console.cpp
index dafa599..35894a9 100644
--- a/apps/script_console.cpp
+++ b/apps/script_console.cpp
@@ -280,6 +280,19 @@ int ExternalFileWriteAll(ExecutionContext *context, Value *returnValue) {
 	return 2;
 }
 
+int ExternalFileAppend(ExecutionContext *context, Value *returnValue) {
+	STACK_POP_STRING_2(entryText, entryBytes, entry2Text, entry2Bytes);
+	returnValue->i = 0;
+	EsFileInformation information = EsFileOpen(entryText, entryBytes, ES_FILE_WRITE);
+
+	if (information.error == ES_SUCCESS) {
+		returnValue->i = EsFileWriteSync(information.handle, information.size, entry2Bytes, entry2Text);
+		EsHandleClose(information.handle);
+	}
+
+	return 2;
+}
+
 int ExternalFileGetSize(ExecutionContext *context, Value *returnValue) {
 	STACK_POP_STRING(entryText, entryBytes);
 	EsDirectoryChild information;
diff --git a/util/script.c b/util/script.c
index b1cd719..a338a78 100644
--- a/util/script.c
+++ b/util/script.c
@@ -509,6 +509,7 @@ char baseModuleSource[] = {
 	"bool PathSetDefaultPrefixToScriptSourceDirectory() #extcall;"
 	"str FileReadAll(str path) #extcall;" // TODO Returning an error?
 	"bool FileWriteAll(str path, str x) #extcall;" // TODO Returning an error?
+	"bool FileAppend(str path, str x) #extcall;" // TODO Returning an error?
 	"bool FileCopy(str source, str destination) #extcall;"
 	"int FileGetSize(str path) #extcall;" // Returns -1 on error. TODO Returning an error code.
 					      
@@ -704,6 +705,7 @@ int ExternalPathGetDefaultPrefix(ExecutionContext *context, Value *returnValue);
 int ExternalPathSetDefaultPrefixToScriptSourceDirectory(ExecutionContext *context, Value *returnValue);
 int ExternalFileReadAll(ExecutionContext *context, Value *returnValue);
 int ExternalFileWriteAll(ExecutionContext *context, Value *returnValue);
+int ExternalFileAppend(ExecutionContext *context, Value *returnValue);
 int ExternalFileCopy(ExecutionContext *context, Value *returnValue);
 int ExternalFileGetSize(ExecutionContext *context, Value *returnValue);
 int ExternalPersistRead(ExecutionContext *context, Value *returnValue);
@@ -742,6 +744,7 @@ ExternalFunction externalFunctions[] = {
 	{ .cName = "PathSetDefaultPrefixToScriptSourceDirectory", .callback = ExternalPathSetDefaultPrefixToScriptSourceDirectory },
 	{ .cName = "FileReadAll", .callback = ExternalFileReadAll },
 	{ .cName = "FileWriteAll", .callback = ExternalFileWriteAll },
+	{ .cName = "FileAppend", .callback = ExternalFileAppend },
 	{ .cName = "FileCopy", .callback = ExternalFileCopy },
 	{ .cName = "FileGetSize", .callback = ExternalFileGetSize },
 	{ .cName = "PersistRead", .callback = ExternalPersistRead },
@@ -5507,6 +5510,23 @@ int ExternalFileWriteAll(ExecutionContext *context, Value *returnValue) {
 	return 2;
 }
 
+int ExternalFileAppend(ExecutionContext *context, Value *returnValue) {
+	STACK_POP_STRING_2(entryText, entryBytes, entry2Text, entry2Bytes);
+	returnValue->i = 0;
+	if (entryBytes == 0) return 2;
+	char *temporary = StringZeroTerminate(entryText, entryBytes);
+	if (!temporary) return 3;
+	FILE *f = fopen(temporary, "ab");
+
+	if (f) {
+		returnValue->i = entry2Bytes == fwrite(entry2Text, 1, entry2Bytes, f);
+		if (fclose(f)) returnValue->i = 0;
+	}
+
+	free(temporary);
+	return 2;
+}
+
 int ExternalPathGetDefaultPrefix(ExecutionContext *context, Value *returnValue) {
 	(void) returnValue;
 	char *data = (char *) malloc(10000);
diff --git a/util/start.script b/util/start.script
index 311cb9c..eb75763 100644
--- a/util/start.script
+++ b/util/start.script
@@ -46,6 +46,7 @@ void Setup(bool forAutomation) {
 	if forAutomation {
 		assert FileWriteAll("bin/build_config.ini", "accepted_license=1\nautomated_build=1\n");
 		assert SystemShellExecute("bin/build get-toolchain");
+		assert FileAppend("bin/build_config.ini", "\nautomated_build=1\n");
 		assert FileWriteAll("bin/commit.txt", StringSlice(StringSplitByCharacter(SystemShellEvaluate("git log"), "\n", true)[0], 8, 15));
 	}
 }