Use #lang racket/base instead of #lang racket

acond.rkt

@@ -1,8 +1,9 @@
-#lang racket
+#lang racket/base
 
 (provide acond it)
 (require anaphoric/it
-         racket/stxparam)
+         racket/stxparam
+         (for-syntax racket/base))
 
 (define-syntax (acond stx)
   (syntax-case stx (else)

aif.rkt

@@ -1,8 +1,9 @@
-#lang racket
+#lang racket/base
 
 (provide aif it)
 (require anaphoric/it
-         racket/stxparam)
+         racket/stxparam
+         (for-syntax racket/base))
 
 (define-syntax-rule (aif condition true-branch false-branch)
   (let ([tmp condition])

awhen.rkt

@@ -1,8 +1,9 @@
-#lang racket
+#lang racket/base
 
 (provide awhen it)
 (require anaphoric/it
-         racket/stxparam)
+         racket/stxparam
+         (for-syntax racket/base))
 
 (define-syntax-rule (awhen condition . body)
   (let ([tmp condition])

cond-let.rkt

@@ -1,7 +1,9 @@
-#lang racket
+#lang racket/base
 
 (provide cond-let)
 
+(require (for-syntax racket/base))
+
 (define-syntax (cond-let stx)
   (syntax-case stx (else)
     [(cond-let [[identifierᵢ conditionᵢ] . bodyᵢ] ... [else . else-body])

if-let.rkt

@@ -1,7 +1,9 @@
-#lang racket
+#lang racket/base
 
 (provide if-let)
 
+(require (for-syntax racket/base))
+
 (define-syntax-rule (if-let [variable condition] true-branch false-branch)
   (let ([tmp condition])
     (if tmp

it.rkt

@@ -1,7 +1,8 @@
-#lang racket
+#lang racket/base
 
 (provide it)
-(require racket/stxparam)
+(require racket/stxparam
+         (for-syntax racket/base))
 
 (define-syntax-parameter it
   (λ (stx)

when-let.rkt

@@ -1,7 +1,9 @@
-#lang racket
+#lang racket/base
 
 (provide when-let)
 
+(require (for-syntax racket/base))
+
 (define-syntax-rule (when-let [variable condition] . body)
   (let ([variable condition])
     (when variable