diff --git a/liballoc/build/.gitignore b/liballoc/build/.gitignore
new file mode 100644
index 0000000..10301e2
--- /dev/null
+++ b/liballoc/build/.gitignore
@@ -0,0 +1 @@
+*.a
diff --git a/libarena/build/.gitignore b/libarena/build/.gitignore
new file mode 100644
index 0000000..10301e2
--- /dev/null
+++ b/libarena/build/.gitignore
@@ -0,0 +1 @@
+*.a
diff --git a/libaux/build/.gitignore b/libaux/build/.gitignore
new file mode 100644
index 0000000..10301e2
--- /dev/null
+++ b/libaux/build/.gitignore
@@ -0,0 +1 @@
+*.a
diff --git a/libioutil/build/.gitignore b/libioutil/build/.gitignore
new file mode 100644
index 0000000..10301e2
--- /dev/null
+++ b/libioutil/build/.gitignore
@@ -0,0 +1 @@
+*.a
diff --git a/libkb/build/.gitignore b/libkb/build/.gitignore
new file mode 100644
index 0000000..10301e2
--- /dev/null
+++ b/libkb/build/.gitignore
@@ -0,0 +1 @@
+*.a
diff --git a/libprocess/build/.gitignore b/libprocess/build/.gitignore
new file mode 100644
index 0000000..10301e2
--- /dev/null
+++ b/libprocess/build/.gitignore
@@ -0,0 +1 @@
+*.a
diff --git a/libstring/build/.gitignore b/libstring/build/.gitignore
new file mode 100644
index 0000000..10301e2
--- /dev/null
+++ b/libstring/build/.gitignore
@@ -0,0 +1 @@
+*.a
diff --git a/libsystem/build/.gitignore b/libsystem/build/.gitignore
new file mode 100644
index 0000000..10301e2
--- /dev/null
+++ b/libsystem/build/.gitignore
@@ -0,0 +1 @@
+*.a
diff --git a/libterminal/build/.gitignore b/libterminal/build/.gitignore
new file mode 100644
index 0000000..10301e2
--- /dev/null
+++ b/libterminal/build/.gitignore
@@ -0,0 +1 @@
+*.a