diff --git a/build.zig b/build.zig
index 5107db3..86b4f48 100644
--- a/build.zig
+++ b/build.zig
@@ -16,10 +16,10 @@ pub fn build(b: *std.build.Builder) !void {
 
     const BuildConfig = struct { name: []const u8, backing: Backing, supports_uart_test: bool = true };
     const all_backings = [_]BuildConfig{
-        BuildConfig{ .name = "boards.arduino_nano", .backing = Backing{ .board = boards.arduino_nano } },
-        BuildConfig{ .name = "boards.arduino_uno", .backing = Backing{ .board = boards.arduino_uno } },
+        //BuildConfig{ .name = "boards.arduino_nano", .backing = Backing{ .board = boards.arduino_nano } },
+        //BuildConfig{ .name = "boards.arduino_uno", .backing = Backing{ .board = boards.arduino_uno } },
         BuildConfig{ .name = "boards.mbed_lpc1768", .backing = Backing{ .board = boards.mbed_lpc1768 } },
-        BuildConfig{ .name = "chips.atmega328p", .backing = Backing{ .chip = chips.atmega328p } },
+        //BuildConfig{ .name = "chips.atmega328p", .backing = Backing{ .chip = chips.atmega328p } },
         BuildConfig{ .name = "chips.lpc1768", .backing = Backing{ .chip = chips.lpc1768 } },
         //BuildConfig{ .name = "chips.stm32f103x8", .backing = Backing{ .chip = chips.stm32f103x8 } },
         BuildConfig{ .name = "boards.stm32f3discovery", .backing = Backing{ .board = boards.stm32f3discovery } },
diff --git a/src/core/gpio.zig b/src/core/gpio.zig
index 75089eb..3636eb9 100644
--- a/src/core/gpio.zig
+++ b/src/core/gpio.zig
@@ -30,7 +30,7 @@ pub const Direction = enum(u1) {
     output = 1,
 };
 
-pub fn Gpio(comptime pin: type, config: anytype) type {
+pub fn Gpio(comptime pin: type, comptime config: anytype) type {
     const mode = @as(Mode, config.mode);
     const Generic = struct {
         // all pins:
diff --git a/src/core/microzig.zig b/src/core/microzig.zig
index cc3b7b5..b5325b7 100644
--- a/src/core/microzig.zig
+++ b/src/core/microzig.zig
@@ -69,16 +69,14 @@ else
     struct {};
 
 // Conditionally export log() if the app has it defined.
-usingnamespace if (@hasDecl(app, "log"))
-    struct {
-        pub const log = app.log;
-    }
+pub const log = if (@hasDecl(app, "log"))
+    app.log
 else
+    // log is a no-op by default. Parts of microzig use the stdlib logging
+    // facility and compilations will now fail on freestanding systems that
+    // use it but do not explicitly set `root.log`
     struct {
-        // log is a no-op by default. Parts of microzig use the stdlib logging
-        // facility and compilations will now fail on freestanding systems that
-        // use it but do not explicitly set `root.log`
-        pub fn log(
+        fn log(
             comptime message_level: std.log.Level,
             comptime scope: @Type(.EnumLiteral),
             comptime format: []const u8,
@@ -89,7 +87,7 @@ else
             _ = format;
             _ = args;
         }
-    };
+    }.log;
 
 /// The microzig default panic handler. Will disable interrupts and loop endlessly.
 pub fn microzig_panic(message: []const u8, _: ?*std.builtin.StackTrace, _: ?usize) noreturn {
@@ -174,7 +172,7 @@ export fn microzig_main() noreturn {
     const info: std.builtin.Type = @typeInfo(@TypeOf(main));
 
     const invalid_main_msg = "main must be either 'pub fn main() void' or 'pub fn main() !void'.";
-    if (info != .Fn or info.Fn.args.len > 0)
+    if (info != .Fn or info.Fn.params.len > 0)
         @compileError(invalid_main_msg);
 
     const return_type = info.Fn.return_type orelse @compileError(invalid_main_msg);
diff --git a/src/main.zig b/src/main.zig
index 7781f25..289502f 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -181,7 +181,6 @@ pub fn addEmbeddedExecutable(
         .app_packages = std.ArrayList(Pkg).init(builder.allocator),
     };
 
-    exe.inner.use_stage1 = true;
     exe.inner.strip = false; // we always want debug symbols, stripping brings us no benefit on embedded
 
     // might not be true for all machines (Pi Pico), but
diff --git a/src/modules/chips/atmega328p/registers.zig b/src/modules/chips/atmega328p/registers.zig
index 53e47b2..d43ad4f 100644
--- a/src/modules/chips/atmega328p/registers.zig
+++ b/src/modules/chips/atmega328p/registers.zig
@@ -1295,8 +1295,8 @@ pub fn mmioInt(addr: usize, comptime size: usize, comptime T: type) *volatile Mm
 }
 
 pub const InterruptVector = extern union {
-    C: fn () callconv(.C) void,
-    Naked: fn () callconv(.Naked) void,
+    C: *const fn () callconv(.C) void,
+    Naked: *const fn () callconv(.Naked) void,
     // Interrupt is not supported on arm
 };
 
diff --git a/src/modules/chips/lpc1768/registers.zig b/src/modules/chips/lpc1768/registers.zig
index 0cd697c..a30184d 100644
--- a/src/modules/chips/lpc1768/registers.zig
+++ b/src/modules/chips/lpc1768/registers.zig
@@ -18797,8 +18797,8 @@ pub fn mmioInt(addr: usize, comptime size: usize, comptime T: type) *volatile Mm
 }
 
 pub const InterruptVector = extern union {
-    C: fn () callconv(.C) void,
-    Naked: fn () callconv(.Naked) void,
+    C: *const fn () callconv(.C) void,
+    Naked: *const fn () callconv(.Naked) void,
     // Interrupt is not supported on arm
 };
 
diff --git a/src/modules/chips/stm32f303/registers.zig b/src/modules/chips/stm32f303/registers.zig
index a4bf055..4ce8ebe 100644
--- a/src/modules/chips/stm32f303/registers.zig
+++ b/src/modules/chips/stm32f303/registers.zig
@@ -34398,8 +34398,8 @@ pub fn mmioInt(addr: usize, comptime size: usize, comptime T: type) *volatile Mm
 }
 
 pub const InterruptVector = extern union {
-    C: fn () callconv(.C) void,
-    Naked: fn () callconv(.Naked) void,
+    C: *const fn () callconv(.C) void,
+    Naked: *const fn () callconv(.Naked) void,
     // Interrupt is not supported on arm
 };
 
diff --git a/src/modules/chips/stm32f407/registers.zig b/src/modules/chips/stm32f407/registers.zig
index 2b24c31..9992f7f 100644
--- a/src/modules/chips/stm32f407/registers.zig
+++ b/src/modules/chips/stm32f407/registers.zig
@@ -52830,8 +52830,8 @@ pub fn mmioInt(addr: usize, comptime size: usize, comptime T: type) *volatile Mm
 }
 
 pub const InterruptVector = extern union {
-    C: fn () callconv(.C) void,
-    Naked: fn () callconv(.Naked) void,
+    C: *const fn () callconv(.C) void,
+    Naked: *const fn () callconv(.Naked) void,
     // Interrupt is not supported on arm
 };
 
diff --git a/src/modules/chips/stm32f429/registers.zig b/src/modules/chips/stm32f429/registers.zig
index 077fcae..b6b5223 100644
--- a/src/modules/chips/stm32f429/registers.zig
+++ b/src/modules/chips/stm32f429/registers.zig
@@ -53872,8 +53872,8 @@ pub fn mmioInt(addr: usize, comptime size: usize, comptime T: type) *volatile Mm
 }
 
 pub const InterruptVector = extern union {
-    C: fn () callconv(.C) void,
-    Naked: fn () callconv(.Naked) void,
+    C: *const fn () callconv(.C) void,
+    Naked: *const fn () callconv(.Naked) void,
     // Interrupt is not supported on arm
 };