diff --git a/develop/iasl/iasl.conf b/develop/iasl/iasl.conf
index f272eec10..6373fa974 100644
--- a/develop/iasl/iasl.conf
+++ b/develop/iasl/iasl.conf
@@ -13,4 +13,4 @@
 # --- SDE-COPYRIGHT-NOTE-END ---
 
 srcdir="acpica-unix-$ver/generate/unix/"
-
+var_append makeinstopt ' ' "DESTDIR=$root/$prefix"
diff --git a/develop/iasl/iasl.desc b/develop/iasl/iasl.desc
index e4c64ead5..63848d743 100644
--- a/develop/iasl/iasl.desc
+++ b/develop/iasl/iasl.desc
@@ -30,6 +30,6 @@
 [L] Free-to-use
 [S] Stable
 [V] 20141107
-[P] X -?---5---9 179.000
+[P] X ??---5---9 179.000
 
 [D] 4293746238 acpica-unix-20141107.tar.gz https://acpica.org/sites/acpica/files/