diff --git a/mibuild/altera_quartus.py b/mibuild/altera_quartus.py
index d2265b086..36d76c373 100644
--- a/mibuild/altera_quartus.py
+++ b/mibuild/altera_quartus.py
@@ -73,7 +73,7 @@ quartus_sta {build_name}.qpf
 
 """.format(build_name=build_name)
 	build_script_file = "build_" + build_name + ".sh"
-	tools.write_to_file(build_script_file, build_script_contents)
+	tools.write_to_file(build_script_file, build_script_contents, force_unix=True)
 
 	r = subprocess.call(["bash", build_script_file])
 	if r != 0:
diff --git a/mibuild/tools.py b/mibuild/tools.py
index 1c2493e4e..35efca74b 100644
--- a/mibuild/tools.py
+++ b/mibuild/tools.py
@@ -14,7 +14,10 @@ def language_by_filename(name):
 		return "vhdl"
 	return None
 
-def write_to_file(filename, contents):
-	f = open(filename, "w")
+def write_to_file(filename, contents, force_unix=False):
+	newline = None
+	if force_unix:
+		newline = "\n"
+	f = open(filename, "w", newline=newline)
 	f.write(contents)
 	f.close()
diff --git a/mibuild/xilinx_ise.py b/mibuild/xilinx_ise.py
index 8bab531a0..8018a1fe2 100644
--- a/mibuild/xilinx_ise.py
+++ b/mibuild/xilinx_ise.py
@@ -157,7 +157,7 @@ bitgen {bitgen_opt} {build_name}.ncd {build_name}.bit
 			par_opt=par_opt, map_opt=map_opt)
 	build_script_contents += ise_commands.format(build_name=build_name)
 	build_script_file = "build_" + build_name + ".sh"
-	tools.write_to_file(build_script_file, build_script_contents)
+	tools.write_to_file(build_script_file, build_script_contents, force_unix=True)
 
 	r = subprocess.call(["bash", build_script_file])
 	if r != 0: