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{ lib, stdenvNoCC, fetchurl }:
let
srcs = {
train-images = fetchurl {
url = "http://yann.lecun.com/exdb/mnist/train-images-idx3-ubyte.gz";
sha256 = "029na81z5a1c9l1a8472dgshami6f2iixs3m2ji6ym6cffzwl3s4";
};
train-labels = fetchurl {
url = "http://yann.lecun.com/exdb/mnist/train-labels-idx1-ubyte.gz";
sha256 = "0p152200wwx0w65sqb65grb3v8ncjp230aykmvbbx2sm19556lim";
};
test-images = fetchurl {
url = "http://yann.lecun.com/exdb/mnist/t10k-images-idx3-ubyte.gz";
sha256 = "1rn4vfigaxn2ms24bf4jwzzflgp3hvz0gksvb8j7j70w19xjqhld";
};
test-labels = fetchurl {
url = "http://yann.lecun.com/exdb/mnist/t10k-labels-idx1-ubyte.gz";
sha256 = "1imf0i194ndjxzxdx87zlgn728xx3p1qhq1ssbmnvv005vwn1bpp";
};
};
in
stdenvNoCC.mkDerivation rec {
pname = "mnist";
version = "2018-11-16";
installPhase = ''
mkdir -p $out
ln -s "${srcs.train-images}" "$out/${srcs.train-images.name}"
ln -s "${srcs.train-labels}" "$out/${srcs.train-labels.name}"
ln -s "${srcs.test-images}" "$out/${srcs.test-images.name}"
ln -s "${srcs.test-labels}" "$out/${srcs.test-labels.name}"
'';
dontUnpack = true;
meta = with lib; {
description = "A large database of handwritten digits";
longDescription = ''
The MNIST database (Modified National Institute of Standards and
Technology database) is a large database of handwritten digits that is
commonly used for training various image processing systems.
'';
homepage = "http://yann.lecun.com/exdb/mnist/index.html";
license = licenses.cc-by-sa-30;
platforms = platforms.all;
maintainers = with maintainers; [ cmcdragonkai ];
};
}
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