Hi, I'm using the following Nix expression to install SNAP for use in a nix-shell.
```
with import <nixpkgs> {};
let dependencies = rec {
_snap = with python27Packages; buildPythonPackage {
name = "snap-3.0.2";
src = fetchurl {
url =
"https://snap.stanford.edu/snappy/release/snap-3.0.2-3.0-centos6.5-x64-py2.6.tar.gz";;
sha256 = "07q3pkm0f49c236vv1yb4kzi09h4nldgdax07r7zr0wbvwlzv43w";
};
};
};
in with dependencies;
stdenv.mkDerivation rec {
name = "snap";
env = buildEnv { name = name; paths = buildInputs; };
buildInputs = [
python27
graphviz
gnuplot
_snap
];
}
```
Unfortunately, when I try to do `import snap`, Python says:
File
"/nix/store/qyavbs7cd4fy0y7grigwhnvfyrypa4a6-python2.7-snap-3.0.2/lib/python2.7/site-packages/snap.py",
line 20, in swig_import_helper
import _snap
ImportError: No module named _snap
I noticed that _snap.so is not under that directory, but it is under an
even deeper directory. I'm guessing this is the problem.
/nix/store/qyavbs7cd4fy0y7grigwhnvfyrypa4a6-python2.7-snap-3.0.2/lib/python2.7/site-packages/nix/store/fmhcxqk5la805i418m861g3g60p4hvm0-python2.7-bootstrapped-pip-9.0.1/lib/python2.7/site-packages
_snap.so also happens to be one of the data_files field in the setup.py
script from the source. What should I change in my Nix expression so
that Python finds _snap.so?
Thanks!
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