diff --git a/.gitignore b/.gitignore
index d804fb8f54..462df4efc7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,4 +41,3 @@ xcuserdata/
 /testresults.html
 /testresults.json
 testament.db
-/csources/
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000..26f35d82cd
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "csources"]
+	path = csources
+	url = ../../nim-lang/csources.git
diff --git a/build.sh b/build.sh
index 139c283599..87e12dcfd7 100644
--- a/build.sh
+++ b/build.sh
@@ -3,7 +3,7 @@ set -e
 set -x
 
 if [ ! -d "csources" ]; then
-	git clone --depth 1 https://github.com/nim-lang/csources.git
+	git submodule update --init --depth 1
 fi
 
 cd "csources"
diff --git a/csources b/csources
new file mode 160000
index 0000000000..15724e2e1f
--- /dev/null
+++ b/csources
@@ -0,0 +1 @@
+Subproject commit 15724e2e1f3e7749d508dfcd995e84fea2850802