diff --git a/pkg/fontconfig/build.zig b/pkg/fontconfig/build.zig
index a7a1ba9ef..96c4ffe4a 100644
--- a/pkg/fontconfig/build.zig
+++ b/pkg/fontconfig/build.zig
@@ -56,7 +56,7 @@ pub fn build(b: *std.Build) !void {
     }
 }
 
-pub fn buildLib(b: *std.Build, module: *std.Build.Module, options: anytype) !*std.Build.Step.Compile {
+fn buildLib(b: *std.Build, module: *std.Build.Module, options: anytype) !*std.Build.Step.Compile {
     const target = options.target;
     const optimize = options.optimize;
 
diff --git a/pkg/harfbuzz/build.zig b/pkg/harfbuzz/build.zig
index a55dc7300..5b7d86408 100644
--- a/pkg/harfbuzz/build.zig
+++ b/pkg/harfbuzz/build.zig
@@ -71,7 +71,7 @@ pub fn build(b: *std.Build) !void {
     }
 }
 
-pub fn buildLib(b: *std.Build, module: *std.Build.Module, options: anytype) !*std.Build.Step.Compile {
+fn buildLib(b: *std.Build, module: *std.Build.Module, options: anytype) !*std.Build.Step.Compile {
     const target = options.target;
     const optimize = options.optimize;
 
diff --git a/pkg/oniguruma/build.zig b/pkg/oniguruma/build.zig
index 886bfc5bd..da7c90674 100644
--- a/pkg/oniguruma/build.zig
+++ b/pkg/oniguruma/build.zig
@@ -53,7 +53,7 @@ pub fn build(b: *std.Build) !void {
     }
 }
 
-pub fn buildLib(b: *std.Build, module: *std.Build.Module, options: anytype) !*std.Build.Step.Compile {
+fn buildLib(b: *std.Build, module: *std.Build.Module, options: anytype) !*std.Build.Step.Compile {
     const target = options.target;
     const optimize = options.optimize;