diff --git a/Makefile b/Makefile
index 9ecbedb..16d26e9 100644
--- a/Makefile
+++ b/Makefile
@@ -18,21 +18,17 @@ PREFIX ?= /usr/local
 
 MANDIR != [ $(PREFIX) = / ] && printf '/usr/share/man\n' \
 	|| printf '/share/man\n'
-SYSEXITS != printf '\043include <sysexits.h>\n' | cpp -M - | sed 's/ /\n/g' \
-	| sed -n 's/sysexits\.h//p' || printf 'include\n'
 
 CC ?= cc
 RUSTC ?= rustc
 RUSTLIBS = --extern getopt=build/o/libgetopt.rlib \
 	--extern sysexits=build/o/libsysexits.rlib \
 	--extern strerror=build/o/libstrerror.rlib
-CFLAGS += -I$(SYSEXITS)
+CFLAGS += -Ibuild/include
 
 .PHONY: all
 all: docs 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:
 	mkdir -p build/bin build/docs build/include build/lib build/o build/test
 
@@ -65,6 +61,12 @@ docs: docs/ build
 rustlibs: build/o/libsysexits.rlib build/o/libgetopt.rlib \
 	build/o/libstrerror.rlib
 
+build/include/sysexits.h: build include/sysexits.h.template
+	cpp -dM -include sysexits.h /dev/null \
+			| grep '^.define EX_' >$@ \
+		|| cpp -dM -include stdlib.h include/sysexits.h.template \
+			| grep -e '^.define EX_' -e '^.define EXIT_' >$@
+
 build/o/libgetopt.rlib: build src/getopt-rs/lib.rs
 	$(RUSTC) $(RUSTFLAGS) --crate-type=lib --crate-name=getopt \
 		-o $@ src/getopt-rs/lib.rs
@@ -73,12 +75,10 @@ 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
-	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 $@ -
+build/o/libsysexits.rlib: build build/include/sysexits.h
+	<build/include/sysexits.h \
+		awk '{ print "pub const " $$2 ": i32 = " $$3 ";"; }' \
+		| $(RUSTC) $(RUSTFLAGS) --crate-type lib -o $@ -
 
 .PHONY: dj
 dj: build/bin/dj
@@ -113,7 +113,7 @@ build/bin/mm: src/mm.c build
 .PHONY: npc
 npc: build/bin/npc
 build/bin/npc: src/npc.c build
-	$(CC) $(CFLAGAS) -o $@ src/npc.c
+	$(CC) $(CFLAGS) -o $@ src/npc.c
 
 .PHONY: rpn
 rpn: build/bin/rpn
@@ -137,10 +137,8 @@ build/bin/strcmp: src/strcmp.c build
 
 .PHONY: swab
 swab: build/bin/swab
-build/bin/swab: src/swab.rs build build/o/libsysexits.rlib
-	$(RUSTC) $(RUSTFLAGS) --extern getopt=build/o/libgetopt.rlib \
-		--extern sysexits=build/o/libsysexits.rlib \
-		-o $@ src/swab.rs
+build/bin/swab: src/swab.rs build rustlibs
+	$(RUSTC) $(RUSTFLAGS) $(RUSTLIBS) -o $@ src/swab.rs
 
 .PHONY: true
 true: build/bin/true
diff --git a/include/sysexits.h b/include/sysexits.h.template
similarity index 100%
rename from include/sysexits.h
rename to include/sysexits.h.template