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-rw-r--r--pkgs/sternenseemann/rust/nix-env-diff.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/sternenseemann/rust/nix-env-diff.rs b/pkgs/sternenseemann/rust/nix-env-diff.rs
index ce68aff6..72b97f97 100644
--- a/pkgs/sternenseemann/rust/nix-env-diff.rs
+++ b/pkgs/sternenseemann/rust/nix-env-diff.rs
@@ -75,7 +75,7 @@ fn print_changed<T: Read>(
     match line.map(|s| parse_nix_env_line(s.as_slice()))? {
       Some((outs, attr)) =>
         for out in outs {
-          if map.get(&out).is_some() {
+          if map.get(&out).is_none() {
             println!("{}", String::from_utf8_lossy(
                 match mode {
                   Mode::PrintOutPaths => &out.0,