tjh.dev
nixpkgs mirror (for testing)
github.com/NixOS/nixpkgs
nix
1{
2 lib,
3 stdenvNoCC,
4 fetchurl,
5}:
6let
7 srcs = {
8 train-images = fetchurl {
9 url = "http://yann.lecun.com/exdb/mnist/train-images-idx3-ubyte.gz";
10 sha256 = "029na81z5a1c9l1a8472dgshami6f2iixs3m2ji6ym6cffzwl3s4";
11 };
12 train-labels = fetchurl {
13 url = "http://yann.lecun.com/exdb/mnist/train-labels-idx1-ubyte.gz";
14 sha256 = "0p152200wwx0w65sqb65grb3v8ncjp230aykmvbbx2sm19556lim";
15 };
16 test-images = fetchurl {
17 url = "http://yann.lecun.com/exdb/mnist/t10k-images-idx3-ubyte.gz";
18 sha256 = "1rn4vfigaxn2ms24bf4jwzzflgp3hvz0gksvb8j7j70w19xjqhld";
19 };
20 test-labels = fetchurl {
21 url = "http://yann.lecun.com/exdb/mnist/t10k-labels-idx1-ubyte.gz";
22 sha256 = "1imf0i194ndjxzxdx87zlgn728xx3p1qhq1ssbmnvv005vwn1bpp";
23 };
24 };
25in
26stdenvNoCC.mkDerivation {
27 pname = "mnist";
28 version = "2018-11-16";
29 installPhase = ''
30 mkdir -p $out
31 ln -s "${srcs.train-images}" "$out/${srcs.train-images.name}"
32 ln -s "${srcs.train-labels}" "$out/${srcs.train-labels.name}"
33 ln -s "${srcs.test-images}" "$out/${srcs.test-images.name}"
34 ln -s "${srcs.test-labels}" "$out/${srcs.test-labels.name}"
35 '';
36 dontUnpack = true;
37 meta = with lib; {
38 description = "Large database of handwritten digits";
39 longDescription = ''
40 The MNIST database (Modified National Institute of Standards and
41 Technology database) is a large database of handwritten digits that is
42 commonly used for training various image processing systems.
43 '';
44 homepage = "http://yann.lecun.com/exdb/mnist/index.html";
45 license = licenses.cc-by-sa-30;
46 platforms = platforms.all;
47 maintainers = with maintainers; [ cmcdragonkai ];
48 };
49}