diff -u -N -r empty/m/m1.scm test/m/m1.scm
--- empty/m/m1.scm	1970-01-01 02:00:00.000000000 +0200
+++ test/m/m1.scm	2018-10-15 11:38:42.154807702 +0300
@@ -0,0 +1,11 @@
+(module
+ m1
+ (foo)
+ (import scheme)
+ (cond-expand
+  (chicken-5 (import (chicken base)))
+  (else (import chicken)))
+
+ (define (foo) (print "foo called"))
+ 
+ )
diff -u -N -r empty/main2.scm test/main2.scm
--- empty/main2.scm	1970-01-01 02:00:00.000000000 +0200
+++ test/main2.scm	2018-10-15 11:59:59.238468035 +0300
@@ -0,0 +1,5 @@
+(cond-expand
+ (chicken-5 (import (chicken base))
+            (import-for-syntax m1))
+ (else (import chicken)
+       (use-for-syntax m1)))
diff -u -N -r empty/main.scm test/main.scm
--- empty/main.scm	1970-01-01 02:00:00.000000000 +0200
+++ test/main.scm	2018-10-15 11:48:54.574302899 +0300
@@ -0,0 +1,7 @@
+(cond-expand
+ (chicken-5 (import (chicken base))
+            (import m1))
+ (else (import chicken)
+       (use m1)))
+
+(foo)
diff -u -N -r empty/run.sh test/run.sh
--- empty/run.sh	1970-01-01 02:00:00.000000000 +0200
+++ test/run.sh	2018-10-15 11:56:47.272108332 +0300
@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+set -e
+set -o pipefail
+
+(
+    cd m
+    csc -s -J m1.scm
+)
+
+csc -I m main.scm
+
+echo "Running main"
+(
+    cd m
+    ../main
+)
+
+echo "Building main2"
+csc -I m main2.scm
+
+echo "Running main2"
+(
+    cd m
+    ../main2
+)
+
+# $ ./run.sh
+#
+# Warning: the following extensions are not currently installed: m1
+# Running main
+# foo called
+# Building main2
+#
+# Error: (require) cannot load extension: m1
+#
+# 	Call history:
+#
+# 	<syntax>	  (scheme#list)
+# 	<syntax>	  (quote ((foo . m1#foo)))
+# 	<syntax>	  (##core#quote ((foo . m1#foo)))
+# 	<syntax>	  (scheme#list)
+# 	<syntax>	  (scheme#list)
+# 	<eval>	  (##sys#register-compiled-module (quote m1) (quote m1) (scheme#list) (quote ((foo . m1#foo))) (scheme...
+# 	<eval>	  (scheme#list)
+# 	<eval>	  (scheme#list)
+# 	<eval>	  (scheme#list)
+# 	<syntax>	  (##core#begin (##core#require m1 m1#))
+# 	<syntax>	  (##core#require m1 m1#)
+# 	<syntax>	  (chicken.load#load-extension (##core#quote m1) (##core#quote (m1#)) (##core#quote require))
+# 	<syntax>	  (##core#quote m1)
+# 	<syntax>	  (##core#quote (m1#))
+# 	<syntax>	  (##core#quote require)
+# 	<eval>	  (chicken.load#load-extension (##core#quote m1) (##core#quote (m1#)) (##core#quote require))	<--