diff --git a/argued/argued.1 b/argued/argued.1
index c365df8..ba9267d 100644
--- a/argued/argued.1
+++ b/argued/argued.1
@@ -8,11 +8,10 @@ argued \(en check for arguments
 
 Argued exits successfully if any arguments are provided, and unsuccessfully otherwise.
 
-.SH STANDARDS
-
-Argued is not described in POSIX.1-2017.
-Argued's function may be performed on a purely POSIX system with test(1).
-
 .SH COPYRIGHT
 
 Public domain.
+
+.SH SEE ALSO
+
+str(1), test(1)
diff --git a/manual/manual b/manual/manual
index 8b5c1bc..5eebc01 100755
--- a/manual/manual
+++ b/manual/manual
@@ -5,33 +5,29 @@ set -e
 str isvalue "$MANUAL_DIR" \
 	|| MANUAL_DIR=/usr/manual
 
-argv0="$0"
-
+# normalization
 ! str isvalue "$1" || str isvalue "$3" \
 	&& printf "Usage: %s [name] (section)\n" "$argv0" 1>&2 \
 	&& exit 1 \
-	|| true
-
+	|| \
 str isvalue "$2" && ! test -e "$MANUAL_DIR/$2/$1" \
 	&& printf "%s: %s: No manual entry in section %s\n" "$0" "$1" "$2" \
 		1>&2 \
 	&& exit 1 \
-	|| true
-
+	|| \
 str isvalue "$2" \
 	&& PAGE="$MANUAL_DIR/$2/$1" \
 	|| for d in "$MANUAL_DIR"/*
 			do test -e "$d/$1" && PAGE="$d/$1"
 		done
 
+# lookup + execution
 ! str isvalue "$PAGE" \
 	&& printf "%s: %s: No manual entry\n" "$0" "$1" 1>&2 \
 	&& exit 1 \
-	|| true
-
+	|| \
 ! str isvalue "$SECTION_DIR" \
 	&& printf "%s: %s: No manual entry\n" "$argv0" "$1" 1>&2 \
 	&& exit 1 \
-	|| true
-
+	|| \
 <"$PAGE" groff -t -e -mandoc -Tascii
diff --git a/str/Makefile b/str/Makefile
index 031e407..e9fface 100644
--- a/str/Makefile
+++ b/str/Makefile
@@ -3,13 +3,10 @@ TARGETS = str
 
 all: $(TARGETS)
 
-str: %.c
-	$(CC) -o $@ $@.c
+str: str.c
+	$(CC) -DINCLUDE_ISVALUE=1 -o $@ $@.c
 
 clean:
 	$(RM) $(TARGETS)
 
-sane: str.c ../include/sysexits.h
-	$(CC) -DDONT_USE_SYSTEM_SYSEXITS -o str str.c
-
-.PHONY: all clean sane
+.PHONY: all clean