diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index ce461fdbd..f732ae8b3 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -14,5 +14,6 @@ jobs:
         with:
           name: ghostty
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+          useDaemon: false # sometimes fails on short jobs
       - name: Check Zig cache hash
         run: nix develop -c ./nix/build-support/check-zig-cache-hash.sh
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8f27ff04d..b7a93b83f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -220,6 +220,8 @@ jobs:
         with:
           name: ghostty
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+          skipPush: true
+          useDaemon: false # sometimes fails on short jobs
       - name: prettier check
         run: nix develop -c prettier --check .
 
@@ -234,5 +236,7 @@ jobs:
         with:
           name: ghostty
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+          skipPush: true
+          useDaemon: false # sometimes fails on short jobs
       - name: alejandra check
         run: nix develop -c alejandra --check .
diff --git a/build.zig b/build.zig
index 0669f27cc..b514cbdce 100644
--- a/build.zig
+++ b/build.zig
@@ -24,7 +24,7 @@ const Command = @import("src/Command.zig");
 // but we liberally update it. In the future, we'll be more careful about
 // using released versions so that package managers can integrate better.
 comptime {
-    const required_zig = "0.12.0-dev.2075+f5978181e";
+    const required_zig = "0.12.0-dev.2701+d18f52197";
     const current_zig = builtin.zig_version;
     const min_zig = std.SemanticVersion.parse(required_zig) catch unreachable;
     if (current_zig.order(min_zig) == .lt) {
diff --git a/flake.lock b/flake.lock
index a3b92f93a..a7f368ff4 100644
--- a/flake.lock
+++ b/flake.lock
@@ -147,11 +147,11 @@
     },
     "nixpkgs-zig-0-12": {
       "locked": {
-        "lastModified": 1707156663,
-        "narHash": "sha256-T0Ah65Sj/HnbEkKmOCaQGSIoNDZDh3K299A0nvXceCk=",
+        "lastModified": 1707614255,
+        "narHash": "sha256-26jDBuCgewZb+ifR3Ow6cZS/6Mz09pwC4ukKWtOjFZk=",
         "owner": "vancluever",
         "repo": "nixpkgs",
-        "rev": "dfe11015af91c9317604d792715f166d9fce7831",
+        "rev": "85b992eb1a8d3a3742ddb21eba7f79b0e4f2e78b",
         "type": "github"
       },
       "original": {
@@ -194,11 +194,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1707148508,
-        "narHash": "sha256-fAQN2Y8wZn8JQWQvA5dfDEorxZLLWTNSdZp39YFAWXk=",
+        "lastModified": 1707611073,
+        "narHash": "sha256-sMsxVKXP5TLcaVMNlRZ7KlDsYGwDdJAMtY0DKmb+7fQ=",
         "owner": "mitchellh",
         "repo": "zig-overlay",
-        "rev": "3e47b1a260a5521e51888b8e71cd04b8e8928cb3",
+        "rev": "aa4edff6f53e64443ca77e8d9ffe866f29e5b3d4",
         "type": "github"
       },
       "original": {
diff --git a/src/Command.zig b/src/Command.zig
index af3979b3e..c5419814c 100644
--- a/src/Command.zig
+++ b/src/Command.zig
@@ -178,7 +178,6 @@ fn startWindows(self: *Command, arena: Allocator) !void {
             .access_mask = windows.GENERIC_READ | windows.SYNCHRONIZE,
             .share_access = windows.FILE_SHARE_READ,
             .creation = windows.OPEN_EXISTING,
-            .io_mode = .blocking,
         },
     ) else null;
     defer if (null_fd) |fd| std.os.close(fd);
diff --git a/src/main_ghostty.zig b/src/main_ghostty.zig
index 05f6a39ed..8b9203e26 100644
--- a/src/main_ghostty.zig
+++ b/src/main_ghostty.zig
@@ -109,58 +109,60 @@ pub fn main() !MainReturn {
     try app_runtime.run();
 }
 
-pub const std_options = struct {
+// The function std.log will call.
+fn logFn(
+    comptime level: std.log.Level,
+    comptime scope: @TypeOf(.EnumLiteral),
+    comptime format: []const u8,
+    args: anytype,
+) void {
+    // Stuff we can do before the lock
+    const level_txt = comptime level.asText();
+    const prefix = if (scope == .default) ": " else "(" ++ @tagName(scope) ++ "): ";
+
+    // Lock so we are thread-safe
+    std.debug.getStderrMutex().lock();
+    defer std.debug.getStderrMutex().unlock();
+
+    // On Mac, we use unified logging. To view this:
+    //
+    //   sudo log stream --level debug --predicate 'subsystem=="com.mitchellh.ghostty"'
+    //
+    if (builtin.target.isDarwin()) {
+        // Convert our levels to Mac levels
+        const mac_level: macos.os.LogType = switch (level) {
+            .debug => .debug,
+            .info => .info,
+            .warn => .err,
+            .err => .fault,
+        };
+
+        // Initialize a logger. This is slow to do on every operation
+        // but we shouldn't be logging too much.
+        const logger = macos.os.Log.create("com.mitchellh.ghostty", @tagName(scope));
+        defer logger.release();
+        logger.log(std.heap.c_allocator, mac_level, format, args);
+    }
+
+    switch (state.logging) {
+        .disabled => {},
+
+        .stderr => {
+            // Always try default to send to stderr
+            const stderr = std.io.getStdErr().writer();
+            nosuspend stderr.print(level_txt ++ prefix ++ format ++ "\n", args) catch return;
+        },
+    }
+}
+
+pub const std_options: std.Options = .{
     // Our log level is always at least info in every build mode.
-    pub const log_level: std.log.Level = switch (builtin.mode) {
+    .log_level = switch (builtin.mode) {
         .Debug => .debug,
         else => .info,
-    };
+    },
 
-    // The function std.log will call.
-    pub fn logFn(
-        comptime level: std.log.Level,
-        comptime scope: @TypeOf(.EnumLiteral),
-        comptime format: []const u8,
-        args: anytype,
-    ) void {
-        // Stuff we can do before the lock
-        const level_txt = comptime level.asText();
-        const prefix = if (scope == .default) ": " else "(" ++ @tagName(scope) ++ "): ";
-
-        // Lock so we are thread-safe
-        std.debug.getStderrMutex().lock();
-        defer std.debug.getStderrMutex().unlock();
-
-        // On Mac, we use unified logging. To view this:
-        //
-        //   sudo log stream --level debug --predicate 'subsystem=="com.mitchellh.ghostty"'
-        //
-        if (builtin.target.isDarwin()) {
-            // Convert our levels to Mac levels
-            const mac_level: macos.os.LogType = switch (level) {
-                .debug => .debug,
-                .info => .info,
-                .warn => .err,
-                .err => .fault,
-            };
-
-            // Initialize a logger. This is slow to do on every operation
-            // but we shouldn't be logging too much.
-            const logger = macos.os.Log.create("com.mitchellh.ghostty", @tagName(scope));
-            defer logger.release();
-            logger.log(std.heap.c_allocator, mac_level, format, args);
-        }
-
-        switch (state.logging) {
-            .disabled => {},
-
-            .stderr => {
-                // Always try default to send to stderr
-                const stderr = std.io.getStdErr().writer();
-                nosuspend stderr.print(level_txt ++ prefix ++ format ++ "\n", args) catch return;
-            },
-        }
-    }
+    .logFn = logFn,
 };
 
 /// This represents the global process state. There should only