diff --git a/Formula/grib-api.rb b/Formula/grib-api.rb
index db02aaa77b..a292465f82 100644
--- a/Formula/grib-api.rb
+++ b/Formula/grib-api.rb
@@ -2,7 +2,9 @@ class GribApi < Formula
   desc "Encode and decode grib messages (editions 1 and 2)"
   homepage "https://software.ecmwf.int/wiki/display/GRIB/Home"
   url "https://software.ecmwf.int/wiki/download/attachments/3473437/grib_api-1.18.0-Source.tar.gz"
+  mirror "https://distfiles.macports.org/grib_api/grib_api-1.18.0-Source.tar.gz"
   sha256 "dfffeeb4df715b234907cb12d6729617bed0df0ff023337c2dd3cd20ab58199e"
+  revision 1
 
   bottle do
     sha256 "afe0ad7af07bbe0855156c20b07033046a31eea7a070ef18a18fc592815b0f1f" => :sierra
@@ -17,7 +19,22 @@ class GribApi < Formula
   depends_on "libpng" => :optional
   depends_on :fortran
 
+  resource "numpy" do
+    url "https://files.pythonhosted.org/packages/16/f5/b432f028134dd30cfbf6f21b8264a9938e5e0f75204e72453af08d67eb0b/numpy-1.11.2.tar.gz"
+    sha256 "04db2fbd64e2e7c68e740b14402b25af51418fc43a59d9e54172b38b906b0f69"
+  end
+
   def install
+    ENV.prepend_create_path "PYTHONPATH", libexec/"vendor/lib/python2.7/site-packages"
+    resource("numpy").stage do
+      system "python", *Language::Python.setup_install_args(libexec/"vendor")
+    end
+
+    # Fix "no member named 'inmem_' in 'jas_image_t'"
+    inreplace "src/grib_jasper_encoding.c", "image.inmem_    = 1;", ""
+
+    inreplace "CMakeLists.txt", "find_package( OpenJPEG )", ""
+
     mkdir "build" do
       args = std_cmake_args
       args << "-DBUILD_SHARED_LIBS=OFF" if build.with? "static"