diff --git a/srcpkgs/isl15/template b/srcpkgs/isl15/template
index e8225eb6d49..0ef1192a219 100644
--- a/srcpkgs/isl15/template
+++ b/srcpkgs/isl15/template
@@ -3,7 +3,6 @@ pkgname=isl15
 version=0.19
 revision=3
 wrksrc="isl-${version}"
-bootstrap=yes
 build_style=gnu-configure
 makedepends="gmp-devel"
 short_desc="Integer Set Library"
diff --git a/srcpkgs/isl15/update b/srcpkgs/isl15/update
new file mode 100644
index 00000000000..ef4dc3a4607
--- /dev/null
+++ b/srcpkgs/isl15/update
@@ -0,0 +1,3 @@
+pkgname=isl
+# ad-hoc updates so ignore everything
+ignore=*