diff --git a/dockerfile-test.scm b/dockerfile-test.scm
index 466c292..412498d 100644
--- a/dockerfile-test.scm
+++ b/dockerfile-test.scm
@@ -1,7 +1,7 @@
 ;; Copyright 2019 Lassi Kortela
 ;; SPDX-License-Identifier: ISC
 
-(import (scheme base) (scheme write) (dockerfile))
+(import (scheme base) (scheme write) (lassik dockerfile))
 
 (display
  (quote-dockerfile
diff --git a/dockerfile.sld b/dockerfile.sld
index dec838d..c4304ef 100644
--- a/dockerfile.sld
+++ b/dockerfile.sld
@@ -3,9 +3,13 @@
 ;; Copyright 2019 Lassi Kortela
 ;; SPDX-License-Identifier: ISC
 
-(define-library (dockerfile)
+(define-library (lassik dockerfile)
   (export quote-dockerfile-instruction
           quote-dockerfile)
-  (import (scheme base) (scheme write) (srfi 1)
-          (chibi match) (unpack-assoc) (shell-quote))
+  (import (scheme base)
+          (scheme write)
+          (srfi 1)
+          (chibi match)
+          (lassik unpack-assoc)
+          (lassik shell-quote))
   (include "dockerfile.scm"))
diff --git a/shell-quote-test.scm b/shell-quote-test.scm
index 567f38d..7faa189 100644
--- a/shell-quote-test.scm
+++ b/shell-quote-test.scm
@@ -1,7 +1,7 @@
 ;; Copyright 2019 Lassi Kortela
 ;; SPDX-License-Identifier: ISC
 
-(import (scheme base) (scheme write) (shell-quote))
+(import (scheme base) (scheme write) (lassik shell-quote))
 
 (define (q x)
   (display (shell-quote x))
diff --git a/shell-quote.sld b/shell-quote.sld
index 59f0aaf..b86b2e7 100644
--- a/shell-quote.sld
+++ b/shell-quote.sld
@@ -1,7 +1,7 @@
 ;; Copyright 2019 Lassi Kortela
 ;; SPDX-License-Identifier: ISC
 
-(define-library (shell-quote)
+(define-library (lassik shell-quote)
   (export shell-quote)
   (import (scheme base) (scheme write) (chibi match))
   (cond-expand
diff --git a/unpack-assoc.sld b/unpack-assoc.sld
index db312f3..4dcf591 100644
--- a/unpack-assoc.sld
+++ b/unpack-assoc.sld
@@ -1,7 +1,7 @@
 ;; Copyright 2019 Lassi Kortela
 ;; SPDX-License-Identifier: ISC
 
-(define-library (unpack-assoc)
+(define-library (lassik unpack-assoc)
   (export unpack
           unpack-case
           unpack-using