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-rw-r--r--pkgs/build-support/docker/default.nix5
1 files changed, 3 insertions, 2 deletions
diff --git a/pkgs/build-support/docker/default.nix b/pkgs/build-support/docker/default.nix
index d0ec90264ee..06f2d923569 100644
--- a/pkgs/build-support/docker/default.nix
+++ b/pkgs/build-support/docker/default.nix
@@ -752,8 +752,9 @@ rec {
           imageTag="${tag}"
         ''}
 
-        if [[ "$created" == "now" ]]; then
-            created="$(TZ=utc date --iso-8601="seconds")"
+        # convert "created" to iso format
+        if [[ "$created" != "now" ]]; then
+            created="$(date -Iseconds -d "$created")"
         fi
 
         # Create $maxLayers worth of Docker Layers, one layer per store path