diff --git a/plugins/pyenv-binary/libexec/pyenv-binary-save b/plugins/pyenv-binary/libexec/pyenv-binary-save
index 16019c71..8e2405b2 100755
--- a/plugins/pyenv-binary/libexec/pyenv-binary-save
+++ b/plugins/pyenv-binary/libexec/pyenv-binary-save
@@ -115,8 +115,12 @@ system_deps() {
       otool -L "$f" 2>/dev/null | tail -n +2 | awk -v pfx="${prefix}/" \
         '$1 !~ /^@/ && substr($1, 1, length(pfx)) != pfx { print $1 }'
     else
+      # GNU binutils 2.44 writes "(NEEDED) ... [name]"; FreeBSD 15.1 writes
+      # "NEEDED ... [name]". readelf(1) documents -d, not its text format.
       needed="$(LC_ALL=C readelf -dW "$f" 2>/dev/null | awk \
         '$2 == "(NEEDED)" || $2 == "NEEDED" { sub(/^.*\[/, ""); sub(/\].*$/, ""); print }' | tr '\n' ' ')"
+      # Linux and FreeBSD ldd write resolved libraries as
+      # "name => /absolute/path (address)"; entries without "=>" are ignored.
       LC_ALL=C ldd "$f" 2>/dev/null | awk -v needed="$needed" -v pfx="${prefix}/" '
         BEGIN {
           split(needed, deps, " ")