diff --git a/Jenkinsfile b/Jenkinsfile
index 8f948cd..64a9150 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -13,7 +13,7 @@ pipeline {
     }
 
     parameters {
-        string(name: 'LIBRARIES', defaultValue: 'system', description: '')
+        string(name: 'LIBRARIES', defaultValue: 'system shell', description: '')
     }
 
     stages {
@@ -29,6 +29,7 @@ pipeline {
                                     stage("${SCHEME}") {
                                         catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
                                             sh "make SCHEME=${SCHEME} clean test-docker"
+                                            archiveArtifacts artifacts: 'tmp/*/*.log', fingerprint: true
                                         }
                                     }
                                 }]
diff --git a/Makefile b/Makefile
index c4f73be..19386a9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,16 @@
 .SILENT: build install test test-docker clean ${TMPDIR}
-LIBRARY=system
-README=${LIBRARY}/README.html
-DESCRIPTION=$(shell head -n1 ${LIBRARY}/README.md)
-VERSION=$(shell cat ${LIBRARY}/VERSION)
-AUTHOR=$(shell cat ${LIBRARY}/AUTHOR | tr '[:upper:]' '[:lower:]')
-LIBRARY_FILE=${LIBRARY}/${AUTHOR}/${LIBRARY}.sld
-PKG=${AUTHOR}-${LIBRARY}-${VERSION}.tgz
 SCHEME=chibi
+LIBRARY=system
+AUTHOR=Retropikzel
+
+LIBRARY_FILE=foreign/c/${LIBRARY}.sld
+VERSION=$(shell cat foreign/c/${LIBRARY}/VERSION)
+DESCRIPTION=$(shell head -n1 foreign/c/${LIBRARY}/README.md)
+README=foreign/c/${LIBRARY}/README.html
+TESTFILE=foreign/c/${LIBRARY}/test.scm
+
+PKG=foreign-c-${LIBRARY}-${VERSION}.tgz
 TMPDIR=tmp/${SCHEME}
-TESTFILE=${LIBRARY}/test.scm
 
 DOCKERIMG=${SCHEME}:head
 ifeq "${SCHEME}" "chicken"
@@ -17,8 +19,8 @@ endif
 
 all: build
 
-build: ${LIBRARY}/LICENSE ${LIBRARY}/VERSION ${LIBRARY}/AUTHOR
-	echo "<pre>$$(cat ${LIBRARY}/README.md)</pre>" > ${README}
+build: foreign/c/${LIBRARY}/LICENSE foreign/c/${LIBRARY}/VERSION
+	echo "<pre>$$(cat foreign/c/${LIBRARY}/README.md)</pre>" > ${README}
 	snow-chibi package --version=${VERSION} --authors=${AUTHOR} --doc=${README} --description="${DESCRIPTION}" ${LIBRARY_FILE}
 
 install:
@@ -30,7 +32,9 @@ uninstall:
 ${TMPDIR}:
 	@mkdir -p ${TMPDIR}
 	@cp ${TESTFILE} ${TMPDIR}/
-	@cp -r ${LIBRARY} ${TMPDIR}/
+	@mkdir -p ${TMPDIR}/foreign/c
+	@cp -r foreign/c/${LIBRARY} ${TMPDIR}/foreign/c/
+	@cp -r foreign/c/${LIBRARY}.s* ${TMPDIR}/foreign/c/
 
 test: ${TMPDIR}
 	echo "Hello"
diff --git a/foreign/c/shell.scm b/foreign/c/shell.scm
new file mode 100644
index 0000000..a37a46a
--- /dev/null
+++ b/foreign/c/shell.scm
@@ -0,0 +1,2 @@
+(define (shell cmd)
+  (display cmd))
diff --git a/foreign/c/shell.sld b/foreign/c/shell.sld
new file mode 100644
index 0000000..bc88ba7
--- /dev/null
+++ b/foreign/c/shell.sld
@@ -0,0 +1,9 @@
+(define-library
+  (foreign c shell)
+  (import (scheme base)
+          (retropikzel named-pipes))
+  (export shell)
+  (include "shell.scm"))
+
+
+
diff --git a/system/LICENSE b/foreign/c/shell/LICENSE
similarity index 100%
rename from system/LICENSE
rename to foreign/c/shell/LICENSE
diff --git a/foreign/c/shell/README.md b/foreign/c/shell/README.md
new file mode 100644
index 0000000..9c01c80
--- /dev/null
+++ b/foreign/c/shell/README.md
@@ -0,0 +1 @@
+Library to run shell commands and get their output
diff --git a/foreign/c/shell/VERSION b/foreign/c/shell/VERSION
new file mode 100644
index 0000000..3eefcb9
--- /dev/null
+++ b/foreign/c/shell/VERSION
@@ -0,0 +1 @@
+1.0.0
diff --git a/foreign/c/shell/test.scm b/foreign/c/shell/test.scm
new file mode 100644
index 0000000..1fb3b0f
--- /dev/null
+++ b/foreign/c/shell/test.scm
@@ -0,0 +1,12 @@
+(import (scheme base)
+        (scheme write)
+        (scheme file)
+        (scheme process-context)
+        (foreign c shell)
+        (srfi 64))
+
+(test-begin "foreign-c-shell")
+
+(display "Hello")
+
+(test-end "foreign-c-shell")
diff --git a/system/retropikzel/system.scm b/foreign/c/system.scm
similarity index 100%
rename from system/retropikzel/system.scm
rename to foreign/c/system.scm
diff --git a/system/retropikzel/system.sld b/foreign/c/system.sld
similarity index 85%
rename from system/retropikzel/system.sld
rename to foreign/c/system.sld
index 5cb61a4..489fcc0 100644
--- a/system/retropikzel/system.sld
+++ b/foreign/c/system.sld
@@ -1,5 +1,5 @@
 (define-library
-  (retropikzel system)
+  (foreign c system)
   (import (scheme base)
           (scheme write)
           (foreign c))
diff --git a/foreign/c/system/LICENSE b/foreign/c/system/LICENSE
new file mode 100644
index 0000000..0a04128
--- /dev/null
+++ b/foreign/c/system/LICENSE
@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
diff --git a/foreign/c/system/README.html b/foreign/c/system/README.html
new file mode 100644
index 0000000..485b9a0
--- /dev/null
+++ b/foreign/c/system/README.html
@@ -0,0 +1,32 @@
+<pre>Execute a shell command.
+
+Built upon [(foreign c)](https://sr.ht/~retropikzel/foreign-c/).
+
+[Repository](https://git.sr.ht/~retropikzel/foreign-c-system)
+
+[Issue tracker](https://sr.ht/~retropikzel/foreign-c/trackers)
+
+[Maling lists](https://sr.ht/~retropikzel/foreign-c/lists)
+
+[Jenkins](https://jenkins.scheme.org/job/retropikzel/job/foreign-c-system/)
+
+
+(**system** _command_)
+
+_command_ is a string containing the command you want to run.
+
+Returns the exit code of the command.
+
+Example:
+
+    (import (scheme base)
+            (scheme write)
+            (scheme file)
+            (retropikzel system))
+
+    (define testfile "test.txt")
+    (system (apply string-append `("echo \"Hello\" > " ,testfile)))
+
+    (define text (with-input-from-file testfile (lambda () (read-line))))
+    (display text)
+    (newline)</pre>
diff --git a/system/README.md b/foreign/c/system/README.md
similarity index 100%
rename from system/README.md
rename to foreign/c/system/README.md
diff --git a/system/VERSION b/foreign/c/system/VERSION
similarity index 100%
rename from system/VERSION
rename to foreign/c/system/VERSION
diff --git a/system/test.scm b/foreign/c/system/test.scm
similarity index 85%
rename from system/test.scm
rename to foreign/c/system/test.scm
index c84e363..df09325 100644
--- a/system/test.scm
+++ b/foreign/c/system/test.scm
@@ -2,8 +2,7 @@
         (scheme write)
         (scheme file)
         (scheme process-context)
-        (foreign c)
-        (retropikzel system)
+        (foreign c system)
         (srfi 64))
 
 (test-begin "foreign-c-system")
@@ -20,6 +19,6 @@
 
 (define exit-code2 (system "no-such-command"))
 
-(test-assert (not (= exit-code1 0)))
+(test-assert (> exit-code2 0))
 
 (test-end "foreign-c-system")
diff --git a/system/AUTHOR b/system/AUTHOR
deleted file mode 100644
index 44dbcb1..0000000
--- a/system/AUTHOR
+++ /dev/null
@@ -1 +0,0 @@
-Retropikzel
diff --git a/system/Jenkinsfile b/system/Jenkinsfile
deleted file mode 100644
index 1fa81ae..0000000
--- a/system/Jenkinsfile
+++ /dev/null
@@ -1,34 +0,0 @@
-pipeline {
-    agent any
-
-    options {
-        disableConcurrentBuilds()
-        buildDiscarder(logRotator(numToKeepStr: '10', artifactNumToKeepStr: '10'))
-    }
-
-    stages {
-        stage('Tests') {
-            steps {
-                script {
-                    def implementations = sh(script: 'docker run retropikzel1/compile-r7rs:chibi sh -c "compile-r7rs --list-r7rs-schemes"', returnStdout: true).split()
-
-                    parallel implementations.collectEntries { SCHEME ->
-                        [(SCHEME): {
-                            stage("${SCHEME}") {
-                                catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
-                                    if("${SCHEME}" == "chicken") {
-                                        DOCKERIMG="chicken:5"
-                                    } else {
-                                        DOCKERIMG="${SCHEME}:head"
-                                    }
-                                    sh "docker build --build-arg IMAGE=${DOCKERIMG} --build-arg SCHEME=${SCHEME} --tag=foreign-c-system-test-${SCHEME} -f Dockerfile.test ."
-                                    sh "docker run -v ${WORKSPACE}:/workdir -w /workdir -t foreign-c-system-test-${SCHEME} sh -c \"timeout 120 make SCHEME=${SCHEME} clean all force-install test\""
-                                }
-                            }
-                        }]
-                    }
-                }
-            }
-        }
-    }
-}
diff --git a/system/Makefile b/system/Makefile
deleted file mode 100644
index 01ff3f6..0000000
--- a/system/Makefile
+++ /dev/null
@@ -1,11 +0,0 @@
-VERSION=1.1.2
-build:
-	snow-chibi package \
-		--version=${VERSION} \
-		--authors="Retropikzel" \
-		--doc=README.html \
-		--description="Library for running shell commands" \
-	retropikzel/system.sld
-
-package-name:
-	@echo "retropikzel-system-${VERSION}