stdenv: don't overwrite $NIX_ENFORCE_PURITY setting

Close #13583.
2016-03-13 21:09:41 +01:00
parent 116215372e
commit d05a3cd763
3 changed files with 3 additions and 3 deletions
@@ -22,7 +22,7 @@ rec {

  commonPreHook =
    ''
-      export NIX_ENFORCE_PURITY=1
+      export NIX_ENFORCE_PURITY="''${NIX_ENFORCE_PURITY-1}"
      ${if system == "x86_64-linux" then "NIX_LIB64_IN_SELF_RPATH=1" else ""}
      ${if system == "mips64el-linux" then "NIX_LIB32_IN_SELF_RPATH=1" else ""}
    '';