diff --git a/Makefile b/Makefile
index 68e673b..f5c9854 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,12 @@
 PREFIX = /usr/local
 MANDIR = ${PREFIX}/share/man
 
+CFLAGS += -I${PREFIX}/include
+LDFLAGS += -L${PREFIX}/lib
+
 CEXTS = gnu-case-range gnu-conditional-omitted-operand
 CFLAGS += -std=c11 -Wall -Wextra -Wpedantic ${CEXTS:%=-Wno-%}
-LDLIBS = -lcrypto -ltls -lncursesw
+LDLIBS = -lncursesw -ltls
 
 -include config.mk
 
@@ -36,23 +39,23 @@ clean:
 	rm -f tags catgirl ${OBJS}
 
 install: catgirl catgirl.1
-	install -d ${PREFIX}/bin ${MANDIR}/man1
-	install catgirl ${PREFIX}/bin
-	gzip -c catgirl.1 > ${MANDIR}/man1/catgirl.1.gz
+	install -d ${DESTDIR}${PREFIX}/bin ${DESTDIR}${MANDIR}/man1
+	install catgirl ${DESTDIR}${PREFIX}/bin
+	install -m 644 catgirl.1 ${DESTDIR}${MANDIR}/man1
 
 uninstall:
-	rm -f ${PREFIX}/bin/catgirl ${MANDIR}/man1/catgirl.1.gz
+	rm -f ${DESTDIR}${PREFIX}/bin/catgirl ${DESTDIR}${MANDIR}/man1/catgirl.1
 
 scripts/sandman: scripts/sandman.o
 	${CC} ${LDFLAGS} scripts/sandman.o -framework Cocoa -o $@
 
 install-sandman: scripts/sandman scripts/sandman.1
-	install -d ${PREFIX}/bin ${MANDIR}/man1
-	install scripts/sandman ${PREFIX}/bin
-	gzip -c scripts/sandman.1 > ${MANDIR}/man1/sandman.1.gz
+	install -d ${DESTDIR}${PREFIX}/bin ${DESTDIR}${MANDIR}/man1
+	install scripts/sandman ${DESTDIR}${PREFIX}/bin
+	install -m 644 scripts/sandman.1 ${DESTDIR}${MANDIR}/man1
 
 uninstall-sandman:
-	rm -f ${PREFIX}/bin/sandman ${MANDIR}/man1/sandman.1.gz
+	rm -f ${DESTDIR}${PREFIX}/bin/sandman ${DESTDIR}${MANDIR}/man1/sandman.1
 
 CHROOT_USER = chat
 CHROOT_GROUP = ${CHROOT_USER}
@@ -87,7 +90,7 @@ chroot.tar: catgirl catgirl.1 scripts/chroot-prompt.sh scripts/chroot-man.sh
 	cp -af /usr/share/locale root/usr/share
 	cp -fp /usr/share/misc/termcap.db root/usr/share/misc
 	cp -fp /rescue/sh /usr/bin/mandoc /usr/bin/less root/bin
-	${MAKE} install PREFIX=root/usr
+	${MAKE} install DESTDIR=root PREFIX=/usr
 	install scripts/chroot-prompt.sh root/usr/bin/catgirl-prompt
 	install scripts/chroot-man.sh root/usr/bin/man
 	tar -c -f chroot.tar -C root bin etc home lib libexec usr
diff --git a/README.7 b/README.7
index 0bc3b13..9bd41bb 100644
--- a/README.7
+++ b/README.7
@@ -1,4 +1,4 @@
-.Dd May  5, 2020
+.Dd May 23, 2020
 .Dt README 7
 .Os "Causal Agency"
 .\" To view this file, run: man ./README.7
@@ -90,6 +90,10 @@ It primarily targets
 .Fx
 and macOS,
 as well as Linux.
+The
+.Pa configure
+step is not necessary on
+.Fx .
 .Bd -literal -offset indent
 \&./configure
 make all
diff --git a/configure b/configure
index b0f818f..88bfb1a 100755
--- a/configure
+++ b/configure
@@ -1,36 +1,20 @@
 #!/bin/sh
 set -eu
 
-case "$(uname)" in
-	(FreeBSD)
-		if ! pkg info -e libressl; then
-			echo 'LibreSSL required'
-			exit 1
-		fi
-		prefix=$(pkg query '%p' libressl)
-		cat >config.mk <<-EOF
-		CFLAGS += -I${prefix}/include
-		CFLAGS += -D'OPENSSL_BIN="${prefix}/bin/openssl"'
-		LDFLAGS += -L${prefix}/lib
-		EOF
-		exit
-		;;
-esac
+exec >config.mk
 
 libs='libcrypto libtls ncursesw'
 pkg-config --print-errors $libs
 
-cat >config.mk <<EOF
+cat <<EOF
 CFLAGS += $(pkg-config --cflags $libs)
-CFLAGS += -D'OPENSSL_BIN="$(pkg-config --variable=prefix openssl)/bin/openssl"'
+CFLAGS += -D'OPENSSL_BIN="$(pkg-config --variable=exec_prefix openssl)/bin/openssl"'
 LDFLAGS += $(pkg-config --libs-only-L $libs)
 LDLIBS = $(pkg-config --libs-only-l $libs)
 EOF
 
-case "$(uname)" in
-	(Linux)
-		if ! grep -q -e '-D_GNU_SOURCE' config.mk; then
-			echo 'CFLAGS += -D_GNU_SOURCE' >> config.mk
-		fi
-		;;
-esac
+if [ "$(uname)" = 'Linux' ]; then
+	cat <<-EOF
+	CFLAGS += -D_GNU_SOURCE
+	EOF
+fi