···

       
92
       
 
       
    <para>Do not use this function in Nixpkgs. Because it breaks

     

       
93
       
 
       
    package abstraction and doesn’t provide error checking for

     

       
94
       
 
       
    function arguments, it is only intended for ad-hoc customisation

     

       
95
       
-
       
    (such as in <filename>~/.nixpkgs/config.nix</filename>).</para>

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
96
       
 
       
  </warning>

     

       
97
       
 
       


     

       
98
       
 
       
  <para>

     

···

       
92
       
 
       
    <para>Do not use this function in Nixpkgs. Because it breaks

     

       
93
       
 
       
    package abstraction and doesn’t provide error checking for

     

       
94
       
 
       
    function arguments, it is only intended for ad-hoc customisation

     

       
95
       
+
       
    (such as in <filename>~/.nixpkgs/config.nix</filename>).

     

       
96
       
+
       
   </para>

     

       
97
       
+
       


     

       
98
       
+
       
   <para>

     

       
99
       
+
       
    Additionally, <varname>overrideDerivation</varname> forces an evaluation

     

       
100
       
+
       
    of the Derivation which can be quite a performance penalty if there are many

     

       
101
       
+
       
    overrides used.

     

       
102
       
+
       
   </para>

     

       
103
       
 
       
  </warning>

     

       
104
       
 
       


     

       
105
       
 
       
  <para>