diff --git a/src/cmd/license.zig b/src/cmd/license.zig
index db2c0635c5989c624999ea780fbcdcfd526f5049..675c5e1ab9e1417e959694fca53ebfb8e78dddcd 100644
--- a/src/cmd/license.zig
+++ b/src/cmd/license.zig
@@ -2,6 +2,7 @@ const std = @import("std");
 const gpa = std.heap.c_allocator;
 const style = @import("ansi").style;
 const licenses = @import("licenses");
+const extras = @import("extras");
 
 const zigmod = @import("../lib.zig");
 const u = @import("./../util/index.zig");
@@ -77,7 +78,7 @@ pub fn execute(args: [][]u8) !void {
         first = false;
         try writer.writeAll(Bold);
         try writer.print("{s}:\n", .{entry.key_ptr.*});
-        if (u.list_contains(licenses.spdx, entry.key_ptr.*)) {
+        if (extras.containsString(licenses.spdx, entry.key_ptr.*)) {
             try writer.writeAll(Faint);
             try writer.print("= {s}{s}\n", .{ "https://spdx.org/licenses/", entry.key_ptr.* });
         }
diff --git a/src/common.zig b/src/common.zig
index 0fea28a9a286a79df078ef7885f69b4d465eb0de..0a2930a8638c22adc90bc4db4291b95cefe56c0f 100644
--- a/src/common.zig
+++ b/src/common.zig
@@ -104,8 +104,8 @@ pub fn get_modpath(cachepath: string, d: zigmod.Dep, options: *CollectOptions) !
     const pv = try std.fs.path.join(options.alloc, &.{ cachepath, try d.clean_path_v(options.alloc) });
 
     const nocache = d.type.isLocal();
-    if (!nocache and u.list_contains(options.already_fetched.items, p)) return p;
-    if (!nocache and u.list_contains(options.already_fetched.items, pv)) return pv;
+    if (!nocache and extras.containsString(options.already_fetched.items, p)) return p;
+    if (!nocache and extras.containsString(options.already_fetched.items, pv)) return pv;
 
     if (options.log and d.type != .local) {
         std.debug.print("fetch: {s}: {s}\n", .{ @tagName(d.type), d.path });
diff --git a/src/util/dep.zig b/src/util/dep.zig
index b111202eb8dc82413b58842d6428f9f74b98dcc4..e9dcf85c2a413508a73a3114b0598a44bc6bb970 100644
--- a/src/util/dep.zig
+++ b/src/util/dep.zig
@@ -56,10 +56,10 @@ pub const Dep = struct {
     pub fn is_for_this(self: Dep) bool {
         const os = @tagName(builtin.os.tag);
         if (self.only_os.len > 0) {
-            return u.list_contains(self.only_os, os);
+            return extras.containsString(self.only_os, os);
         }
         if (self.except_os.len > 0) {
-            return !u.list_contains(self.except_os, os);
+            return !extras.containsString(self.except_os, os);
         }
         return true;
     }
diff --git a/src/util/funcs.zig b/src/util/funcs.zig
index 8cb0b073c0e6412dab0c3f77fdc7ec748ffa0aba..08880c66e53e814ac5b6dce2edf8f4ae1103fe21 100644
--- a/src/util/funcs.zig
+++ b/src/util/funcs.zig
@@ -75,15 +75,6 @@ pub fn trim_suffix(in: string, suffix: string) string {
     return in;
 }
 
-pub fn list_contains(haystack: []const string, needle: string) bool {
-    for (haystack) |item| {
-        if (std.mem.eql(u8, item, needle)) {
-            return true;
-        }
-    }
-    return false;
-}
-
 pub fn list_contains_gen(comptime T: type, haystack: []const T, needle: T) bool {
     for (haystack) |item| {
         if (item.eql(needle)) {
diff --git a/src/util/module.zig b/src/util/module.zig
index 600edbddd2b386df213903ea2d6139d72bd7b22d..958a9cc26bfc46311aa464b60ac78d616d71c520 100644
--- a/src/util/module.zig
+++ b/src/util/module.zig
@@ -98,10 +98,10 @@ pub const Module = struct {
     pub fn is_for_this(self: Module) bool {
         const os = @tagName(builtin.os.tag);
         if (self.only_os.len > 0) {
-            return u.list_contains(self.only_os, os);
+            return extras.containsString(self.only_os, os);
         }
         if (self.except_os.len > 0) {
-            return !u.list_contains(self.except_os, os);
+            return !extras.containsString(self.except_os, os);
         }
         return true;
     }