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-rw-r--r--pkgs/stdenv/generic/setup.sh4
1 files changed, 4 insertions, 0 deletions
diff --git a/pkgs/stdenv/generic/setup.sh b/pkgs/stdenv/generic/setup.sh
index cadfeadc6dbe..9f9d64df8e48 100644
--- a/pkgs/stdenv/generic/setup.sh
+++ b/pkgs/stdenv/generic/setup.sh
@@ -78,6 +78,10 @@ addToSearchPath() {
 
 set -e
 
+# Check that the directory pointed by HOME, usually '/homeless-shelter',
+# does not exist, as it may be a good source for impurities.
+! test -e $HOME
+
 test -z $NIX_GCC && NIX_GCC=@gcc@