diff -ur a/bootstrap-prefix.sh b/bootstrap-prefix.sh
--- a/bootstrap-prefix.sh	2020-10-24 15:50:24.266777899 +0300
+++ b/bootstrap-prefix.sh	2020-10-24 16:57:07.864168126 +0300
@@ -2687,8 +2687,14 @@
 			EPREFIX=
 			continue
 		fi
-		if [[ $(stat -c '%U/%G' "${EPREFIX}"/.canihaswrite) != \
-			$(stat -c '%U/%G' "${EPREFIX}") ]] ;
+		# GNU and BSD variants of stat take different arguments (and format specifiers are not equivalent)
+		case "${CHOST}" in
+		*-darwin* | *-freebsd*) STAT='stat -f %u/%g' ;;
+		*)                      STAT='stat -c %U/%G' ;;
+	esac
+		
+		if [[ $($STAT "${EPREFIX}"/.canihaswrite) != \
+			$($STAT "${EPREFIX}") ]] ;
 		then
 			echo
 			echo "The $EPREFIX directory has different ownership than expected."