I love it! So I send some fixes. Thanks.

README.md

@@ -8,6 +8,14 @@ from emacs comint.el in a slightly easier to use fashion.
   ;;In elisp code
   (defproc "noir-server" "lein" '("run")
   "Run a noir server")
+  (defproc echo-test "echo" `(,buffer-file-name)
+  "Print `buffer-file-name'")
+  (defproc echo-test2 "echo" `(,buffer-file-name)
+  "Print `buffer-file-name' without selecting *echo* buffer."
+  'display-buffer)
+  (defproc xeyes "xeyes" nil
+  "Run xeyes without popping up *xeyes* buffer"
+  'ignore)
 ```
 
 While editing:

subshell-proc.el

@@ -1,4 +1,4 @@
-;;; subshell-proc.el --- Functions for working with comints
+;;; subshell-proc.el --- Functions for working with comints -*- lexical-binding: -*-
 ;; Author: Andrew Mains
 ;; URL: https://github.com/andrewmains12/subshell-proc
 ;; Version: 0.2
@@ -7,48 +7,46 @@
 ;;
 ;; ;;In elisp code
 ;; (defproc noir-server "lein" '("run")
-;; "Run a noir server")  
+;; "Run a noir server")
+;; (defproc echo-test "echo" `(,buffer-file-name)
+;; "Print `buffer-file-name'")
+;; (defproc echo-test2 "echo" `(,buffer-file-name)
+;; "Print `buffer-file-name' without selecting *echo* buffer."
+;; 'display-buffer)
+;; (defproc xeyes "xeyes" nil
+;; "Run xeyes without popping up *xeyes* buffer"
+;; 'ignore)
 ;;
 ;; While editing:
-;;   M-x run-proc 
+;;   M-x run-proc
 ;;     bash
-;;   will bring up a comint running bash  
+;;   will bring up a comint running bash
 ;;
 ;;
 
-(require 'cl)
-
-
-(defmacro defproc (fn-name command command-args &optional docstring)
+(defmacro defproc (fn-name command &optional command-args docstring display-fn)
   "Defines an interactive function which creates a comint subprocess using command"
-    `(defun ,fn-name (&rest extra-args)       
+    `(defun ,fn-name (&rest extra-args)
        ,docstring
        (interactive)
-       (funcall 
-        (make-proc-run-fn ,command ,command-args 
-                          ,(format "*%s*" (symbol-name fn-name))))
-     ))
-
-
-(defun make-proc-run-fn (command command-args &optional buffer-name)
-  (lexical-let ((buffer-name buffer-name)
-                (command command)
-                (command-args command-args)
-                )
-    (function (lambda (&rest extra-args)                
-                (let* ((buffer-name (or buffer-name (format "*%s*" command)))
-                       (buffer (get-buffer-create buffer-name))
-                       )
-                  (pop-to-buffer buffer)
-                  (apply 'make-comint-in-buffer 
-                         (append (list buffer-name buffer command nil) command-args))
-                  )))))
-
+       (funcall
+        (make-proc-run-fn ,command ,command-args
+                          ,(format "*%s*" (symbol-name fn-name))
+                          ,display-fn))))
+
+(defun make-proc-run-fn (command &optional command-args buffer-name display-fn)
+  (lambda (&rest extra-args)
+    (let* ((buffer-name (or buffer-name (format "*%s*" command)))
+           (buffer (get-buffer-create buffer-name)))
+      (funcall (or display-fn 'pop-to-buffer) buffer)
+      (apply 'make-comint-in-buffer
+             (append (list buffer-name buffer command nil) command-args)))))
 
 (defun run-proc (command &optional buffer-name)
   (interactive "MCommand to run: ")
-  (let ((command-list (split-string command)))
-    (funcall (make-proc-run-fn (car command-list) (cdr command-list) buffer-name))))
+  (funcall (make-proc-run-fn shell-file-name
+                             (list shell-command-switch command)
+                             buffer-name)))
 
 (provide 'subshell-proc)