diff --git a/.builds/meson_min.yml b/.builds/meson_min.yml
index 0d4a34c9..3427157b 100644
--- a/.builds/meson_min.yml
+++ b/.builds/meson_min.yml
@@ -19,4 +19,5 @@ tasks:
     meson configure -Dint_types=false
     meson configure -Dtyped_arrays=false
     meson configure -Dreduced_os=true
+    meson configure -Dprf=false
     ninja # will not pass tests but should build
diff --git a/meson.build b/meson.build
index 2681ae49..7002b640 100644
--- a/meson.build
+++ b/meson.build
@@ -68,6 +68,9 @@ conf.set('JANET_RECURSION_GUARD', get_option('recursion_guard'))
 conf.set('JANET_MAX_PROTO_DEPTH', get_option('max_proto_depth'))
 conf.set('JANET_MAX_MACRO_EXPAND', get_option('max_macro_expand'))
 conf.set('JANET_STACK_MAX', get_option('stack_max'))
+conf.set('JANET_NO_UMASK', not get_option('umask'))
+conf.set('JANET_NO_REALPATH', not get_option('realpath'))
+conf.set('JANET_NO_PROCESSES', not get_option('processes'))
 if get_option('os_name') != ''
   conf.set('JANET_OS_NAME', get_option('os_name'))
 endif
diff --git a/meson_options.txt b/meson_options.txt
index 1d0bd77c..bfc8925f 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -12,6 +12,9 @@ option('typed_array', type : 'boolean', value : true)
 option('int_types', type : 'boolean', value : true)
 option('prf', type : 'boolean', value : true)
 option('net', type : 'boolean', value : true)
+option('processes', type : 'boolean', value : true)
+option('umask', type : 'boolean', value : true)
+option('realpath', type : 'boolean', value : true)
 
 option('recursion_guard', type : 'integer', min : 10, max : 8000, value : 1024)
 option('max_proto_depth', type : 'integer', min : 10, max : 8000, value : 200)