diff --git a/Makefile b/Makefile
index d82e30f..d231cf9 100644
--- a/Makefile
+++ b/Makefile
@@ -51,6 +51,9 @@ endif
 ifdef DEBIAN
 CPPFLAGS += -DDEBIAN
 endif
+ifdef NIXOS
+CPPFLAGS += -DNIXOS
+endif
 ifdef DEFAULT_OLD_METADATA
  CPPFLAGS += -DDEFAULT_OLD_METADATA
  DEFAULT_METADATA=0.90
@@ -105,6 +108,7 @@ endif
 INSTALL = /usr/bin/install
 DESTDIR =
 BINDIR  = /sbin
+INSTALL_BINDIR = ${BINDIR}
 MANDIR  = /usr/share/man
 MAN4DIR = $(MANDIR)/man4
 MAN5DIR = $(MANDIR)/man5
@@ -259,20 +263,20 @@ sha1.o : sha1.c sha1.h md5.h
 	$(CC) $(CFLAGS) -DHAVE_STDINT_H -o sha1.o -c sha1.c
 
 install : mdadm mdmon install-man install-udev
-	$(INSTALL) -D $(STRIP) -m 755 mdadm $(DESTDIR)$(BINDIR)/mdadm
-	$(INSTALL) -D $(STRIP) -m 755 mdmon $(DESTDIR)$(BINDIR)/mdmon
+	$(INSTALL) -D $(STRIP) -m 755 mdadm $(DESTDIR)$(INSTALL_BINDIR)/mdadm
+	$(INSTALL) -D $(STRIP) -m 755 mdmon $(DESTDIR)$(INSTALL_BINDIR)/mdmon
 
 install-static : mdadm.static install-man
-	$(INSTALL) -D $(STRIP) -m 755 mdadm.static $(DESTDIR)$(BINDIR)/mdadm
+	$(INSTALL) -D $(STRIP) -m 755 mdadm.static $(DESTDIR)$(INSTALL_BINDIR)/mdadm
 
 install-tcc : mdadm.tcc install-man
-	$(INSTALL) -D $(STRIP) -m 755 mdadm.tcc $(DESTDIR)$(BINDIR)/mdadm
+	$(INSTALL) -D $(STRIP) -m 755 mdadm.tcc $(DESTDIR)$(INSTALL_BINDIR)/mdadm
 
 install-uclibc : mdadm.uclibc install-man
-	$(INSTALL) -D $(STRIP) -m 755 mdadm.uclibc $(DESTDIR)$(BINDIR)/mdadm
+	$(INSTALL) -D $(STRIP) -m 755 mdadm.uclibc $(DESTDIR)$(INSTALL_BINDIR)/mdadm
 
 install-klibc : mdadm.klibc install-man
-	$(INSTALL) -D $(STRIP) -m 755 mdadm.klibc $(DESTDIR)$(BINDIR)/mdadm
+	$(INSTALL) -D $(STRIP) -m 755 mdadm.klibc $(DESTDIR)$(INSTALL_BINDIR)/mdadm
 
 install-man: mdadm.8 md.4 mdadm.conf.5 mdmon.8
 	$(INSTALL) -D -m 644 mdadm.8 $(DESTDIR)$(MAN8DIR)/mdadm.8
@@ -305,7 +309,7 @@ install-systemd: systemd/mdmon@.service
 	if [ -f /etc/SuSE-release -o -n "$(SUSE)" ] ;then $(INSTALL) -D -m 755 systemd/SUSE-mdadm_env.sh $(DESTDIR)$(SYSTEMD_DIR)/../scripts/mdadm_env.sh ;fi
 
 uninstall:
-	rm -f $(DESTDIR)$(MAN8DIR)/mdadm.8 $(DESTDIR)$(MAN8DIR)/mdmon.8 $(DESTDIR)$(MAN4DIR)/md.4 $(DESTDIR)$(MAN5DIR)/mdadm.conf.5 $(DESTDIR)$(BINDIR)/mdadm
+	rm -f $(DESTDIR)$(MAN8DIR)/mdadm.8 $(DESTDIR)$(MAN8DIR)/mdmon.8 $(DESTDIR)$(MAN4DIR)/md.4 $(DESTDIR)$(MAN5DIR)/mdadm.conf.5 $(DESTDIR)$(INSTALL_BINDIR)/mdadm
 
 test: mdadm mdmon test_stripe swap_super raid6check
 	@echo "Please run './test' as root"
diff --git a/policy.c b/policy.c
index 064d349..6b2f2b1 100644
--- a/policy.c
+++ b/policy.c
@@ -796,12 +796,39 @@ char *find_rule(struct rule *rule, char *rule_type)
 #define UDEV_RULE_FORMAT \
 "ACTION==\"add\", SUBSYSTEM==\"block\", " \
 "ENV{DEVTYPE}==\"%s\", ENV{ID_PATH}==\"%s\", " \
-"RUN+=\"" BINDIR "/mdadm --incremental $env{DEVNAME}\"\n"
+"RUN+=\"%s/mdadm --incremental $env{DEVNAME}\"\n"
 
 #define UDEV_RULE_FORMAT_NOTYPE \
 "ACTION==\"add\", SUBSYSTEM==\"block\", " \
 "ENV{ID_PATH}==\"%s\", " \
-"RUN+=\"" BINDIR "/mdadm --incremental $env{DEVNAME}\"\n"
+"RUN+=\"%s/mdadm --incremental $env{DEVNAME}\"\n"
+
+#ifdef NIXOS
+const char *get_mdadm_bindir(void)
+{
+	static char *bindir = NULL;
+	if (bindir != NULL) {
+		return bindir;
+	} else {
+		int len;
+		bindir = xmalloc(1025);
+		len = readlink("/proc/self/exe", bindir, 1024);
+		if (len > 0) {
+			char *basename;
+			if ((basename = strrchr(bindir, '/')) != NULL)
+				*basename = '\0';
+			else
+				*(bindir + len) = '\0';
+		} else {
+			*bindir = '\0';
+		}
+		return bindir;
+	}
+}
+#define SELF get_mdadm_bindir()
+#else
+#define SELF BINDIR
+#endif
 
 /* Write rule in the rule file. Use format from UDEV_RULE_FORMAT */
 int write_rule(struct rule *rule, int fd, int force_part)
@@ -815,9 +842,9 @@ int write_rule(struct rule *rule, int fd, int force_part)
 	if (force_part)
 		typ = type_part;
 	if (typ)
-		snprintf(line, sizeof(line) - 1, UDEV_RULE_FORMAT, typ, pth);
+		snprintf(line, sizeof(line) - 1, UDEV_RULE_FORMAT, typ, pth, SELF);
 	else
-		snprintf(line, sizeof(line) - 1, UDEV_RULE_FORMAT_NOTYPE, pth);
+		snprintf(line, sizeof(line) - 1, UDEV_RULE_FORMAT_NOTYPE, pth, SELF);
 	return write(fd, line, strlen(line)) == (int)strlen(line);
 }
 
diff --git a/util.c b/util.c
index cc98d3b..1ada2f4 100644
--- a/util.c
+++ b/util.c
@@ -1700,7 +1700,9 @@ int start_mdmon(char *devnm)
 	char pathbuf[1024];
 	char *paths[4] = {
 		pathbuf,
+#ifndef NIXOS
 		BINDIR "/mdmon",
+#endif
 		"./mdmon",
 		NULL
 	};