diff --git a/src/auth.zig b/src/auth.zig
index 4401d29..9d3941c 100644
--- a/src/auth.zig
+++ b/src/auth.zig
@@ -35,14 +35,27 @@ pub fn authenticate(
     try setXdgEnv(allocator, tty_str, uid_str, current_environment.xdg_name);
 
     // Open the PAM session
-    var credentials = [_][]const u8{ login.text.items, password.text.items };
+    const login_text_z = try allocator.dupeZ(u8, login.text.items);
+    defer allocator.free(login_text_z);
+
+    const password_text_z = try allocator.dupeZ(u8, password.text.items);
+    defer allocator.free(password_text_z);
+
+    var credentials: [*c][*c]const u8 = undefined;
+    credentials[0] = login_text_z.ptr;
+    credentials[1] = password_text_z.ptr;
+    credentials[2] = 0;
+
     const conv = interop.pam.pam_conv{
         .conv = loginConv,
         .appdata_ptr = @ptrCast(&credentials),
     };
     var handle: ?*interop.pam.pam_handle = undefined;
 
-    var status = interop.pam.pam_start(service_name.ptr, null, &conv, &handle);
+    const service_name_z = try allocator.dupeZ(u8, service_name);
+    defer allocator.free(service_name_z);
+
+    var status = interop.pam.pam_start(service_name_z.ptr, null, &conv, &handle);
     defer status = interop.pam.pam_end(handle, status);
 
     if (status != interop.pam.PAM_SUCCESS) return pamDiagnose(status);
@@ -64,9 +77,6 @@ pub fn authenticate(
     password.clear();
 
     // Get password structure from username
-    const login_text_z = try allocator.dupeZ(u8, login.text.items);
-    defer allocator.free(login_text_z);
-
     const maybe_pwd = interop.getpwnam(login_text_z.ptr);
     interop.endpwent();
 
@@ -198,12 +208,12 @@ fn setXdgEnv(allocator: Allocator, tty_str: [:0]u8, uid_str: [:0]u8, desktop_nam
     const desktop_name_z = try allocator.dupeZ(u8, desktop_name);
     defer allocator.free(desktop_name_z);
 
-    _ = interop.setenv("XDG_RUNTIME_DIR", uid_str, 0);
+    _ = interop.setenv("XDG_RUNTIME_DIR", uid_str.ptr, 0);
     _ = interop.setenv("XDG_SESSION_CLASS", "user", 0);
     _ = interop.setenv("XDG_SESSION_ID", "1", 0);
-    _ = interop.setenv("XDG_SESSION_DESKTOP", desktop_name_z, 0);
+    _ = interop.setenv("XDG_SESSION_DESKTOP", desktop_name_z.ptr, 0);
     _ = interop.setenv("XDG_SEAT", "seat0", 0);
-    _ = interop.setenv("XDG_VTNR", tty_str, 0);
+    _ = interop.setenv("XDG_VTNR", tty_str.ptr, 0);
 }
 
 fn loginConv(
diff --git a/src/main.zig b/src/main.zig
index 960f41e..b649449 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -138,16 +138,13 @@ pub fn main() !void {
         const reader = file.reader();
         const username_length = try reader.readIntLittle(u64);
 
-        const username_buffer = try reader.readAllAlloc(allocator, username_length);
+        const username_buffer = try allocator.alloc(u8, username_length);
         defer allocator.free(username_buffer);
 
         _ = try reader.read(username_buffer);
 
         const current_desktop = try reader.readIntLittle(u64);
 
-        const load_buffer = try reader.readAllAlloc(allocator, config.ly.max_login_len + 5);
-        defer allocator.free(load_buffer);
-
         if (username_buffer.len > 0) {
             try login.text.appendSlice(username_buffer);
             login.end = username_buffer.len;