diff --git a/Makefile b/Makefile
index 813ddd1..e4ad3f7 100644
--- a/Makefile
+++ b/Makefile
@@ -5,13 +5,17 @@ BUILDOPTS = -a -tags netgo
 LDFLAGS = -ldflags '-s -w -extldflags "-static" -X main.version=$(VERSION)'
 LDFLAGS_NATIVE = -ldflags '-s -w -X main.version=$(VERSION)'
 
+GO := go
+
 src = $(wildcard *.go)
 
 native: bin-native
 all: bin-linux-amd64 bin-linux-386 bin-linux-arm \
 	bin-freebsd-amd64 bin-freebsd-386 bin-freebsd-arm \
-	bin-darwin-amd64 \
-	bin-windows-amd64 bin-windows-386
+	bin-netbsd-amd64 bin-netbsd-386 \
+	bin-openbsd-amd64 bin-openbsd-386 \
+	bin-darwin-amd64 bin-darwin-arm64 \
+	bin-windows-amd64 bin-windows-386 bin-windows-arm
 
 bin-native: $(OUTSUFFIX)
 bin-linux-amd64: $(OUTSUFFIX).linux-amd64
@@ -20,51 +24,75 @@ bin-linux-arm: $(OUTSUFFIX).linux-arm
 bin-freebsd-amd64: $(OUTSUFFIX).freebsd-amd64
 bin-freebsd-386: $(OUTSUFFIX).freebsd-386
 bin-freebsd-arm: $(OUTSUFFIX).freebsd-arm
+bin-netbsd-amd64: $(OUTSUFFIX).netbsd-amd64
+bin-netbsd-386: $(OUTSUFFIX).netbsd-386
+bin-openbsd-amd64: $(OUTSUFFIX).openbsd-amd64
+bin-openbsd-386: $(OUTSUFFIX).openbsd-386
 bin-darwin-amd64: $(OUTSUFFIX).darwin-amd64
+bin-darwin-arm64: $(OUTSUFFIX).darwin-arm64
 bin-windows-amd64: $(OUTSUFFIX).windows-amd64.exe
 bin-windows-386: $(OUTSUFFIX).windows-386.exe
+bin-windows-arm: $(OUTSUFFIX).windows-arm.exe
 
 $(OUTSUFFIX): $(src)
-	go build $(LDFLAGS_NATIVE) -o $@
+	$(GO) build $(LDFLAGS_NATIVE) -o $@
 
 $(OUTSUFFIX).linux-amd64: $(src)
-	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build $(BUILDOPTS) $(LDFLAGS) -o $@
+	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
 
 $(OUTSUFFIX).linux-386: $(src)
-	CGO_ENABLED=0 GOOS=linux GOARCH=386 go build $(BUILDOPTS) $(LDFLAGS) -o $@
+	CGO_ENABLED=0 GOOS=linux GOARCH=386 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
 
 $(OUTSUFFIX).linux-arm: $(src)
-	CGO_ENABLED=0 GOOS=linux GOARCH=arm go build $(BUILDOPTS) $(LDFLAGS) -o $@
+	CGO_ENABLED=0 GOOS=linux GOARCH=arm $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
 
 $(OUTSUFFIX).freebsd-amd64: $(src)
-	CGO_ENABLED=0 GOOS=freebsd GOARCH=amd64 go build $(BUILDOPTS) $(LDFLAGS) -o $@
+	CGO_ENABLED=0 GOOS=freebsd GOARCH=amd64 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
 
 $(OUTSUFFIX).freebsd-386: $(src)
-	CGO_ENABLED=0 GOOS=freebsd GOARCH=386 go build $(BUILDOPTS) $(LDFLAGS) -o $@
+	CGO_ENABLED=0 GOOS=freebsd GOARCH=386 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
 
 $(OUTSUFFIX).freebsd-arm: $(src)
-	CGO_ENABLED=0 GOOS=freebsd GOARCH=arm go build $(BUILDOPTS) $(LDFLAGS) -o $@
+	CGO_ENABLED=0 GOOS=freebsd GOARCH=arm $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
+
+$(OUTSUFFIX).netbsd-amd64: $(src)
+	CGO_ENABLED=0 GOOS=netbsd GOARCH=amd64 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
+
+$(OUTSUFFIX).netbsd-386: $(src)
+	CGO_ENABLED=0 GOOS=netbsd GOARCH=386 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
+
+$(OUTSUFFIX).openbsd-amd64: $(src)
+	CGO_ENABLED=0 GOOS=openbsd GOARCH=amd64 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
+
+$(OUTSUFFIX).openbsd-386: $(src)
+	CGO_ENABLED=0 GOOS=openbsd GOARCH=386 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
 
 $(OUTSUFFIX).darwin-amd64: $(src)
-	CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 go build $(BUILDOPTS) $(LDFLAGS) -o $@
+	CGO_ENABLED=0 GOOS=darwin GOARCH=amd64 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
+
+$(OUTSUFFIX).darwin-arm64: $(src)
+	CGO_ENABLED=0 GOOS=darwin GOARCH=arm64 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
 
 $(OUTSUFFIX).windows-amd64.exe: $(src)
-	CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build $(BUILDOPTS) $(LDFLAGS) -o $@
+	CGO_ENABLED=0 GOOS=windows GOARCH=amd64 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
 
 $(OUTSUFFIX).windows-386.exe: $(src)
-	CGO_ENABLED=0 GOOS=windows GOARCH=386 go build $(BUILDOPTS) $(LDFLAGS) -o $@
+	CGO_ENABLED=0 GOOS=windows GOARCH=386 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
+
+$(OUTSUFFIX).windows-arm.exe: $(src)
+	CGO_ENABLED=0 GOOS=windows GOARCH=arm GOARM=7 $(GO) build $(BUILDOPTS) $(LDFLAGS) -o $@
 
 clean:
 	rm -f bin/*
 
 fmt:
-	go fmt ./...
+	$(GO) fmt ./...
 
 run:
-	go run $(LDFLAGS) .
+	$(GO) run $(LDFLAGS) .
 
 install:
-	go install $(LDFLAGS_NATIVE) .
+	$(GO) install $(LDFLAGS_NATIVE) .
 
 .PHONY: clean all native fmt install \
 	bin-native \