diff --git a/algs4/Makefile b/algs4/Makefile
index fa5000b..abd2c63 100644
--- a/algs4/Makefile
+++ b/algs4/Makefile
@@ -1,8 +1,9 @@
 CLEAN_GOPATH := $(shell echo $(GOPATH) | tr ":" "\n" | grep -v '^$$' | grep -v $(PWD) | tr "\n" ":")
 GOPATH := $(PWD):$(CLEAN_GOPATH)
-PACKAGES := \
-	meatballhat.com/algs4 \
-	meatballhat.com/algs4-gcd
+PACKAGES := $(foreach pkg,\
+		$(shell ls src/meatballhat.com),\
+		$(patsubst %,meatballhat.com/%,$(pkg))\
+	)
 
 test: build
 	go test $(PACKAGES)
diff --git a/algs4/src/meatballhat.com/algs4-binarysearch/main.go b/algs4/src/meatballhat.com/algs4-binarysearch/main.go
new file mode 100644
index 0000000..170f1b6
--- /dev/null
+++ b/algs4/src/meatballhat.com/algs4-binarysearch/main.go
@@ -0,0 +1,19 @@
+package main
+
+import (
+    "fmt"
+    "io/ioutil"
+    "os"
+)
+
+func main() {
+    whiteListTxt, err := ioutil.ReadAll(os.Stdin)
+
+    if err != nil {
+        fmt.Println("UGH: ", err)
+        os.Exit(1)
+    }
+
+    fmt.Println("YAP")
+    fmt.Println("Got: ", string(whiteListTxt))
+}