diff --git a/pkgs/shells/bash/5.nix b/pkgs/shells/bash/5.nix
index 00b4a707ed08..6b126390c9f6 100644
--- a/pkgs/shells/bash/5.nix
+++ b/pkgs/shells/bash/5.nix
@@ -61,6 +61,10 @@ stdenv.mkDerivation rec {
       url = "https://cgit.freebsd.org/ports/plain/shells/bash/files/patch-configure?id=3e147a1f594751a68fea00a28090d0792bee0b51";
       sha256 = "XHFMQ6eXTReNoywdETyrfQEv1rKF8+XFbQZP4YoVKFk=";
     })
+    # Apply parallel build fix pending upstream inclusion:
+    #   https://savannah.gnu.org/patch/index.php?10373
+    # Had to fetch manually to workaround -p0 default.
+    ./parallel.patch
   ];
 
   configureFlags = [
diff --git a/pkgs/shells/bash/parallel.patch b/pkgs/shells/bash/parallel.patch
new file mode 100644
index 000000000000..d9a0cc28ce04
--- /dev/null
+++ b/pkgs/shells/bash/parallel.patch
@@ -0,0 +1,12 @@
+From https://savannah.gnu.org/patch/index.php?10373
+  https://savannah.gnu.org/patch/download.php?file_id=54964
+--- Makefile.in
++++ Makefile.in
+@@ -1432,6 +1432,7 @@ siglist.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
+ subst.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
+ test.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
+ trap.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
++unwind_prot.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
+ variables.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
+ version.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h
+ xmalloc.o: bashintl.h ${LIBINTL_H} $(BASHINCDIR)/gettext.h