diff options
| -rw-r--r-- | pkgs/stdenv/generic/setup.sh | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/pkgs/stdenv/generic/setup.sh b/pkgs/stdenv/generic/setup.sh index b1b982ecdffc1..cbf2a2ceb8dee 100644 --- a/pkgs/stdenv/generic/setup.sh +++ b/pkgs/stdenv/generic/setup.sh @@ -992,13 +992,22 @@ stripHash() { unpackCmdHooks+=(_defaultUnpack) _defaultUnpack() { local fn="$1" + local destination if [ -d "$fn" ]; then + destination="$(stripHash "$fn")" + + if [ -e "$destination" ]; then + echo "Cannot copy $fn to $destination: destination already exists!" + echo "Did you specify two \"srcs\" with the same \"name\"?" + return 1 + fi + # We can't preserve hardlinks because they may have been # introduced by store optimization, which might break things # in the build. - cp -pr --reflink=auto -- "$fn" "$(stripHash "$fn")" + cp -pr --reflink=auto -- "$fn" "$destination" else |