diff --git a/.gitignore b/.gitignore
index 8a7ab828c..25c8bd948 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,7 @@
 *.o
 .merlin
 
-.vscode
\ No newline at end of file
+_build
+byterun/byterun
+
+.vscode
diff --git a/.ignore b/.ignore
new file mode 100644
index 000000000..47b986fcc
--- /dev/null
+++ b/.ignore
@@ -0,0 +1,2 @@
+regression
+spec