diff --git a/Makefile b/Makefile
index 1952a25..7756c56 100644
--- a/Makefile
+++ b/Makefile
@@ -8,11 +8,10 @@
 # permitted in any medium without royalty provided the copyright notice and this
 # notice are preserved.  This file is offered as-is, without any warranty.
 
-.POSIX:
+# The octal escape \043 is utilized twice in this file as make(1p) will
+# interpret a hash in a rule as an inline comment.
 
-# if using BSD make(1), remove these pragmas because they break it
-.PRAGMA: posix_202x # future POSIX standard support à la pdpmake(1)
-.PRAGMA: command_comment # breaks without this?
+.POSIX:
 
 DESTDIR ?= dist
 PREFIX ?= /usr/local
@@ -32,9 +31,9 @@ CFLAGS += -I$(SYSEXITS)
 .PHONY: all
 all: dj false fop hru intcmp mm npc rpn scrut str strcmp swab true
 
+# keep build/include until bindgen(1) has stdin support
+# https://github.com/rust-lang/rust-bindgen/issues/2703
 build:
-	# keep build/include until bindgen(1) has stdin support
-	# https://github.com/rust-lang/rust-bindgen/issues/2703
 	mkdir -p build/bin build/include build/lib build/o build/test
 
 .PHONY: clean
@@ -67,9 +66,9 @@ build/o/libstrerror.rlib: build src/strerror.rs
 	$(RUSTC) $(RUSTFLAGS) --crate-type=lib -o $@ \
 		src/strerror.rs
 
+# bandage solution until bindgen(1) gets stdin support
 build/o/libsysexits.rlib: build $(SYSEXITS)sysexits.h
-	# bandage solution until bindgen(1) gets stdin support
-	printf '#define EXIT_FAILURE 1\n' | cat - $(SYSEXITS)sysexits.h \
+	printf '\043define EXIT_FAILURE 1\n' | cat - $(SYSEXITS)sysexits.h \
 		> build/include/sysexits.h 
 	bindgen --default-macro-constant-type signed --use-core --formatter=none \
 		build/include/sysexits.h | $(RUSTC) $(RUSTFLAGS) --crate-type lib -o $@ -