diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 53cca32fe..fcc9c3239 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -45,8 +45,11 @@ jobs:
       - name: Build testproject
         run: |
           cd resources/testproject
-          ..\..\build\${{ matrix.build_type }}\c3c.exe --debug-log run hello_world_win32
+          ..\..\build\${{ matrix.build_type }}\c3c.exe --debug-log --emit-llvm run hello_world_win32
+          dir build\llvm_ir
           ..\..\build\${{ matrix.build_type }}\c3c.exe clean
+          dir build\llvm_ir
+          
 
       - name: Build testproject lib
         run: |
diff --git a/src/compiler/compiler.c b/src/compiler/compiler.c
index 10bad1d47..e89d86d09 100644
--- a/src/compiler/compiler.c
+++ b/src/compiler/compiler.c
@@ -854,7 +854,7 @@ static void execute_scripts(void)
 		StringSlice call = slice_next_token(&execs, ' ');
 		if (call.len < 3 || call.ptr[call.len - 3] != '.' || call.ptr[call.len - 2] != 'c' || call.ptr[call.len - 2] != '3')
 		{
-			(void)execute_cmd(exec);
+			(void) execute_cmd(exec, false);
 			continue;
 		}
 		scratch_buffer_clear();
diff --git a/src/compiler/libraries.c b/src/compiler/libraries.c
index 9fe479501..77fa87c3e 100644
--- a/src/compiler/libraries.c
+++ b/src/compiler/libraries.c
@@ -257,11 +257,11 @@ void resolve_libraries(void)
 		}
 		FOREACH_BEGIN(const char *exec, library->execs)
 			printf("] Execute '%s' for library '%s':", exec, library->provides);
-			puts(execute_cmd(exec));
+			puts(execute_cmd(exec, false));
 		FOREACH_END();
 		FOREACH_BEGIN(const char *exec, target->execs)
 			printf("] Execute '%s' for library '%s':", exec, library->provides);
-			puts(execute_cmd(exec));
+			puts(execute_cmd(exec, false));
 		FOREACH_END();
 	}
 }
\ No newline at end of file
diff --git a/src/compiler/sema_passes.c b/src/compiler/sema_passes.c
index 97a80cdc7..5f3f9cda3 100644
--- a/src/compiler/sema_passes.c
+++ b/src/compiler/sema_passes.c
@@ -284,7 +284,7 @@ static Decl **sema_run_exec(CompilationUnit *unit, Decl *decl)
 	}
 	else
 	{
-		const char *output = execute_cmd(scratch_buffer_to_string());
+		const char *output = execute_cmd(scratch_buffer_to_string(), false);
 		file = source_file_text_load(scratch_buffer_to_string(), output);
 	}
 	if (old_path)
diff --git a/src/utils/file_utils.c b/src/utils/file_utils.c
index 7df5a7b7a..e862c0bc2 100644
--- a/src/utils/file_utils.c
+++ b/src/utils/file_utils.c
@@ -481,15 +481,15 @@ bool file_delete_file(const char *path)
 #endif
 }
 
-bool file_delete_all_files_in_dir_with_suffix(const char *path, const char *suffix)
+void file_delete_all_files_in_dir_with_suffix(const char *path, const char *suffix)
 {
 	assert(path);
 #if (_MSC_VER)
-	const char *cmd = "del /q \"%s\\*%s\"";
+	const char *cmd = "del /q \"%s\\*%s\" >nul 2>&1";
 #else
 	const char *cmd = "rm -f %s/*%s";
 #endif
-	return execute_cmd(str_printf(cmd, path, suffix)) == 0;
+	execute_cmd(str_printf(cmd, path, suffix), true);
 }
 
 #if (_MSC_VER)
@@ -571,7 +571,7 @@ void file_add_wildcard_files(const char ***files, const char *path, bool recursi
 #endif
 
 #define BUFSIZE 1024
-const char *execute_cmd(const char *cmd)
+const char *execute_cmd(const char *cmd, bool ignore_failure)
 {
 	char buffer[BUFSIZE];
 	char *output = "";
@@ -579,11 +579,13 @@ const char *execute_cmd(const char *cmd)
 #if (_MSC_VER)
 	if (!(process = _wpopen(win_utf8to16(cmd), L"r")))
 	{
+		if (ignore_failure) return "";
 		error_exit("Failed to open a pipe for command '%s'.", cmd);
 	}
 #else
 	if (!(process = popen(cmd, "r")))
 	{
+		if (ignore_failure) return "";
 		error_exit("Failed to open a pipe for command '%s'.", cmd);
 	}
 #endif
@@ -598,6 +600,7 @@ const char *execute_cmd(const char *cmd)
 #endif
 	if (err)
 	{
+		if (ignore_failure) return "";
 		error_exit("Failed to execute '%s'.", cmd);
 	}
 
diff --git a/src/utils/lib.h b/src/utils/lib.h
index 9978770ec..9e762777d 100644
--- a/src/utils/lib.h
+++ b/src/utils/lib.h
@@ -72,7 +72,8 @@ bool file_namesplit(const char *path, char** filename_ptr, char** directory_ptr)
 const char* file_expand_path(const char* path);
 const char* find_lib_dir(void);
 const char *find_rel_exe_dir(const char *dir);
-bool file_delete_all_files_in_dir_with_suffix(const char *dir, const char *suffix);
+
+void file_delete_all_files_in_dir_with_suffix(const char *dir, const char *suffix);
 bool file_delete_file(const char *path);
 bool file_is_dir(const char *file);
 bool file_exists(const char *path);
@@ -86,7 +87,7 @@ bool file_has_suffix_in_list(const char *file_name, int name_len, const char **s
 void file_add_wildcard_files(const char ***files, const char *path, bool recursive, const char **suffix_list, int suffix_count);
 const char *file_append_path(const char *path, const char *name);
 
-const char *execute_cmd(const char *cmd);
+const char *execute_cmd(const char *cmd, bool ignore_failure);
 bool execute_cmd_failable(const char *cmd, const char **result);
 void *cmalloc(size_t size);
 void *ccalloc(size_t size, size_t elements);