diff --git a/build/moz.configure/pkg.configure b/build/moz.configure/pkg.configure
--- a/build/moz.configure/pkg.configure
+++ b/build/moz.configure/pkg.configure
@@ -14,11 +14,11 @@
     "PKG_CONFIG",
     pkg_config,
     bootstrap=depends(when=target_sysroot.bootstrapped)(lambda: "pkgconf"),
     allow_missing=True,
     when=compile_environment
-    & depends(target.os)(lambda os: os not in ("WINNT", "OSX", "Android")),
+    & depends(target.os)(lambda os: os not in ("WINNT", "Android")),
 )
 
 
 @depends_if(pkg_config)
 @checking("for pkg-config version")