diff -Naur cron-old/externs.h cron-new/externs.h
--- cron-old/externs.h	2024-08-23 09:04:25.525752797 -0300
+++ cron-new/externs.h	2024-08-23 10:12:05.304311078 -0300
@@ -121,3 +121,14 @@
 #ifndef WCOREDUMP
 # define WCOREDUMP(st)          (((st) & 0200) != 0)
 #endif
+
+/* Nixpkgs-specific patch begin */
+
+/*
+  Implicit saved UIDs do not work here due to way NixOS uses setuid wrappers
+  See https://github.com/NixOS/nixpkgs/issues/16518
+ */
+
+#undef HAVE_SAVED_UIDS
+
+/* Nixpkgs-specific patch end */
diff -Naur cron-old/pathnames.h cron-new/pathnames.h
--- cron-old/pathnames.h	2024-08-23 09:04:25.524752791 -0300
+++ cron-new/pathnames.h	2024-08-23 10:11:33.186749198 -0300
@@ -105,4 +105,23 @@
 # define _PATH_DEVNULL "/dev/null"
 #endif
 
+/* Nixpkgs-specific patch begin */
+
+/*
+  We want to ignore the $glibc/include/paths.h definition of sendmail path.
+  Further, set a usable default PATH
+  See https://github.com/NixOS/nixpkgs/issues/16518
+ */
+
+#undef _PATH_SENDMAIL
+#define _PATH_SENDMAIL "@sendmailPath@"
+
+#undef _PATH_VI
+#define _PATH_VI "@viPath@"
+
+#undef _PATH_DEFPATH
+#define _PATH_DEFPATH "@defPath@"
+
+/* Nixpkgs-specific patch end */
+
 #endif /* _PATHNAMES_H_ */