···

       
105
       
105
       
 
       
    src = myWebApp;

     

       
106
       
106
       
 
       
  };

     

       
107
       
107
       
 
       


     

       
108
       
108
       
+
       
  nativeBuildInputs = [

     

       
109
       
109
       
+
       
    writableTmpDirAsHomeHook # note 3

     

       
110
       
110
       
+
       
  ];

     

       
111
       
111
       
+
       


     

       
108
       
112
       
 
       
  buildPhase = ''

     

       
109
       
113
       
 
       
    cp --reflink=auto --no-preserve=mode -R $bowerComponents/bower_components . # note 2

     

       
110
       
110
       
-
       
    export HOME=$PWD # note 3

     

       
111
       
114
       
 
       
    ${pkgs.nodePackages.gulp}/bin/gulp build # note 4

     

       
112
       
115
       
 
       
  '';

     

       
113
       
116
       
 
       


     

···

       
118
       
118
       
 
       
  ];

     

       
119
       
119
       
 
       
  nativeBuildInputs = [

     

       
120
       
120
       
 
       
    pkg-config

     

       
121
       
121
       
+
       
    writableTmpDirAsHomeHook

     

       
121
       
122
       
 
       
    zlib

     

       
122
       
123
       
 
       
  ];

     

       
123
       
124
       
 
       


     
···

       
140
       
141
       
 
       
  '';

     

       
141
       
142
       
 
       


     

       
142
       
143
       
 
       
  buildPhase = ''

     

       
143
       
143
       
-
       
    HOME=$TMPDIR

     

       
144
       
144
       
 
       
    make -f Makefile.emEnv

     

       
145
       
145
       
 
       
  '';

     

       
146
       
146
       
 
       


     

···

       
646
       
646
       
 
       


     

       
647
       
647
       
 
       
```nix

     

       
648
       
648
       
 
       
{

     

       
649
       
649
       
+
       
  nativeBuildInputs = [

     

       
650
       
650
       
+
       
    writableTmpDirAsHomeHook

     

       
651
       
651
       
+
       
  ];

     

       
652
       
652
       
+
       


     

       
649
       
653
       
 
       
  buildPhase = ''

     

       
650
       
650
       
-
       
    export HOME=$(mktemp -d)

     

       
651
       
654
       
 
       
    yarn --offline build

     

       
652
       
655
       
 
       
  '';

     

       
653
       
656
       
 
       
}

     

···

       
2135
       
2135
       
 
       


     

       
2136
       
2136
       
 
       
#### Common issues {#common-issues}

     

       
2137
       
2137
       
 
       


     

       
2138
       
2138
       
-
       
* Tests that attempt to access `$HOME` can be fixed by using the following

     

       
2139
       
2139
       
-
       
  work-around before running tests (e.g. `preCheck`): `export HOME=$(mktemp -d)`

     

       
2138
       
2138
       
+
       
* Tests that attempt to access `$HOME` can be fixed by using `writableTmpDirAsHomeHook` in

     

       
2139
       
2139
       
+
       
  `nativeCheckInputs`, which sets up a writable temporary directory as the home directory. Alternatively,

     

       
2140
       
2140
       
+
       
  you can achieve the same effect manually (e.g. in `preCheck`) with: `export HOME=$(mktemp -d)`.

     

       
2140
       
2141
       
 
       
* Compiling with Cython causes tests to fail with a `ModuleNotLoadedError`.

     

       
2141
       
2142
       
 
       
  This can be fixed with two changes in the derivation: 1) replacing `pytest` with

     

       
2142
       
2143
       
 
       
  `pytestCheckHook` and 2) adding a `preCheck` containing `cd $out` to run

     

···

       
173
       
173
       
 
       
      (writeShellScript "force-tex-output.sh" ''

     

       
174
       
174
       
 
       
        out="''${tex-}"

     

       
175
       
175
       
 
       
      '')

     

       
176
       
176
       
+
       
      writableTmpDirAsHomeHook # Need a writable $HOME for latexmk

     

       
176
       
177
       
 
       
    ];

     

       
177
       
178
       
 
       


     

       
178
       
179
       
 
       
    dontConfigure = true;

     
···

       
184
       
185
       
 
       
      latex foiltex.ins

     

       
185
       
186
       
 
       


     

       
186
       
187
       
 
       
      # Generate the documentation

     

       
187
       
187
       
-
       
      export HOME=.

     

       
188
       
188
       
 
       
      latexmk -pdf foiltex.dtx

     

       
189
       
189
       
 
       


     

       
190
       
190
       
 
       
      runHook postBuild