diff --git a/pmg-rs/Makefile b/pmg-rs/Makefile
index 07b5b40..f1b7cbb 100644
--- a/pmg-rs/Makefile
+++ b/pmg-rs/Makefile
@@ -47,10 +47,10 @@ install: target/release/libpmg_rs.so
 	install -d -m755 $(DESTDIR)$(PERL_INSTALLVENDORARCH)/auto
 	install -m644 target/release/libpmg_rs.so $(DESTDIR)$(PERL_INSTALLVENDORARCH)/auto/libpmg_rs.so
 	install -d -m755 $(DESTDIR)$(PERL_INSTALLVENDORLIB)/PMG/RS
-	for i in $(PM_DIRS); do \
+	set -e && for i in $(PM_DIRS); do \
 	  install -d -m755 $(DESTDIR)$(PERL_INSTALLVENDORLIB)/$$i; \
 	done
-	for i in $(PM_FILES); do \
+	set -e && for i in $(PM_FILES); do \
 	  install -m644 $$i $(DESTDIR)$(PERL_INSTALLVENDORLIB)/$$i; \
 	done
 
diff --git a/pve-rs/Makefile b/pve-rs/Makefile
index 77f9082..c70217f 100644
--- a/pve-rs/Makefile
+++ b/pve-rs/Makefile
@@ -48,10 +48,10 @@ install: target/release/libpve_rs.so
 	install -d -m755 $(DESTDIR)$(PERL_INSTALLVENDORARCH)/auto
 	install -m644 target/release/libpve_rs.so $(DESTDIR)$(PERL_INSTALLVENDORARCH)/auto/libpve_rs.so
 	install -d -m755 $(DESTDIR)$(PERL_INSTALLVENDORLIB)/PVE/RS
-	for i in $(PM_DIRS); do \
+	set -e && for i in $(PM_DIRS); do \
 	  install -d -m755 $(DESTDIR)$(PERL_INSTALLVENDORLIB)/$$i; \
 	done
-	for i in $(PM_FILES); do \
+	set -e && for i in $(PM_FILES); do \
 	  install -m644 $$i $(DESTDIR)$(PERL_INSTALLVENDORLIB)/$$i; \
 	done