diff --git a/ports/atmel-samd/.gitignore b/ports/atmel-samd/.gitignore
deleted file mode 100644
index 414487d53e..0000000000
--- a/ports/atmel-samd/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build-*/
diff --git a/ports/cxd56/.gitignore b/ports/cxd56/.gitignore
deleted file mode 100644
index 414487d53e..0000000000
--- a/ports/cxd56/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build-*/
diff --git a/ports/litex/.gitignore b/ports/litex/.gitignore
deleted file mode 100644
index 414487d53e..0000000000
--- a/ports/litex/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build-*/
diff --git a/ports/mimxrt10xx/.gitignore b/ports/mimxrt10xx/.gitignore
deleted file mode 100644
index 414487d53e..0000000000
--- a/ports/mimxrt10xx/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build-*/
diff --git a/ports/nrf/.gitignore b/ports/nrf/.gitignore
index cda23c7a90..91dce2841a 100644
--- a/ports/nrf/.gitignore
+++ b/ports/nrf/.gitignore
@@ -1,9 +1,2 @@
-# Old Nordic soft devices that don't allow redistribution
-#########################################################
-drivers/bluetooth/s132_nrf52_2.0.1/
-
+# Softdevice .hex files that should be preserved
 !drivers/bluetooth/*/*.hex
-
-# Build files
-#####################
-build-*/
diff --git a/ports/raspberrypi/.gitignore b/ports/raspberrypi/.gitignore
deleted file mode 100644
index 414487d53e..0000000000
--- a/ports/raspberrypi/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-build-*/
diff --git a/ports/stm/.gitignore b/ports/stm/.gitignore
index 5d645392ca..ade7a0d09d 100644
--- a/ports/stm/.gitignore
+++ b/ports/stm/.gitignore
@@ -1,9 +1,3 @@
-# Build files
-#####################
-build-*/
-
 # Reference files
 #####################
 ref/
-
-.gdb_history
diff --git a/ports/unix/.gitignore b/ports/unix/.gitignore
index 6745218688..3ca8f6cb27 100644
--- a/ports/unix/.gitignore
+++ b/ports/unix/.gitignore
@@ -1,4 +1,3 @@
 micropython
 micropython-*
-*.py
 *.gcov