diff --git a/.travis.yml b/.travis.yml
index 62343f6..3cb4f7a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -47,18 +47,25 @@ before_script:
   fi
 
 script:
-- if [ -n "$DDOC" ]; then
+- set -e;
+  if [ -n "$DDOC" ]; then
     dub build :meta -b ddox --compiler=$DC;
+    dub build :sys -b ddox --compiler=$DC;
+    dub build :os -b ddox --compiler=$DC;
+    dub build :encoding -b ddox --compiler=$DC;
     dub build -b ddox --compiler=$DC;
   elif [ -z "$DSCANNER" ]; then
     dub test :meta -b ${UNITTEST:-unittest} --arch=$ARCH --compiler=$DC;
+    dub test :sys -b ${UNITTEST:-unittest} --arch=$ARCH --compiler=$DC;
+    dub test :os -b ${UNITTEST:-unittest} --arch=$ARCH --compiler=$DC;
+    dub test :encoding -b ${UNITTEST:-unittest} --arch=$ARCH --compiler=$DC;
     dub test -b ${UNITTEST:-unittest} --arch=$ARCH --compiler=$DC;
   else
     dub fetch dscanner --version=$DSCANNER;
 
-    FILES=$(find source -type f);
+    FILES=$(find source */source -type f);
     dub run dscanner -- --styleCheck $FILES;
   fi
 
 after_success:
-- test "$UNITTEST" && bash <(curl -s https://codecov.io/bash)
+- test "$UNITTEST" && bash <(curl -s https://codecov.io/bash) || true
diff --git a/appveyor.yml b/appveyor.yml
index 61eea5c..fd4db00 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -58,4 +58,7 @@ test_script:
   - 'dub --version'
   - '%DC% --version'
   - dub test :meta -b unittest --arch=%Darch% --compiler=%DC%
+  - dub test :sys -b unittest --arch=%Darch% --compiler=%DC%
+  - dub test :os -b unittest --arch=%Darch% --compiler=%DC%
+  - dub test :encoding -b unittest --arch=%Darch% --compiler=%DC%
   - dub test -b unittest --arch=%Darch% --compiler=%DC%
diff --git a/dub.json b/dub.json
index 736c5ba..823f97f 100644
--- a/dub.json
+++ b/dub.json
@@ -10,7 +10,10 @@
 	"targetType": "library",
 
 	"dependencies": {
-		"tanya:meta": "*"
+		"tanya:meta": "*",
+		"tanya:sys": "*",
+		"tanya:os": "*",
+		"tanya:encoding": "*"
 	},
 
 	"dependencies-linux": {
@@ -18,7 +21,10 @@
 	},
 
 	"subPackages": [
-		"./meta"
+		"./meta",
+		"./sys",
+		"./os",
+		"./encoding"
 	],
 
 	"configurations": [
diff --git a/encoding/dub.json b/encoding/dub.json
new file mode 100644
index 0000000..9c50acd
--- /dev/null
+++ b/encoding/dub.json
@@ -0,0 +1,9 @@
+{
+	"name": "encoding",
+	"description": "This package provides tools to work with text encodings",
+	"targetType": "library",
+
+	"dependencies": {
+		"tanya:meta": "*"
+	}
+}
diff --git a/source/tanya/encoding/ascii.d b/encoding/source/tanya/encoding/ascii.d
similarity index 99%
rename from source/tanya/encoding/ascii.d
rename to encoding/source/tanya/encoding/ascii.d
index c30d931..c664861 100644
--- a/source/tanya/encoding/ascii.d
+++ b/encoding/source/tanya/encoding/ascii.d
@@ -8,7 +8,7 @@
  * ASCII is $(B A)merican $(B S)tandard $(B C)ode for $(B I)nformation
  * $(B I)nterchange.
  *
- * Copyright: Eugene Wissner 2017-2018.
+ * Copyright: Eugene Wissner 2017-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/encoding/package.d b/encoding/source/tanya/encoding/package.d
similarity index 94%
rename from source/tanya/encoding/package.d
rename to encoding/source/tanya/encoding/package.d
index 49f5ca5..e9912ee 100644
--- a/source/tanya/encoding/package.d
+++ b/encoding/source/tanya/encoding/package.d
@@ -5,7 +5,7 @@
 /**
  * This package provides tools to work with text encodings.
  *
- * Copyright: Eugene Wissner 2017-2018.
+ * Copyright: Eugene Wissner 2017-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/os/dub.json b/os/dub.json
new file mode 100644
index 0000000..87df29d
--- /dev/null
+++ b/os/dub.json
@@ -0,0 +1,9 @@
+{
+	"name": "os",
+	"description": "Platform-independent interfaces to operating system functionality",
+	"targetType": "library",
+
+	"dependencies": {
+		"tanya:meta": "*"
+	}
+}
diff --git a/source/tanya/os/error.d b/os/source/tanya/os/error.d
similarity index 99%
rename from source/tanya/os/error.d
rename to os/source/tanya/os/error.d
index bc4a008..b80404a 100644
--- a/source/tanya/os/error.d
+++ b/os/source/tanya/os/error.d
@@ -5,7 +5,7 @@
 /**
  * This module provides a portable way of using operating system error codes.
  *
- * Copyright: Eugene Wissner 2017-2018.
+ * Copyright: Eugene Wissner 2017-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/os/package.d b/os/source/tanya/os/package.d
similarity index 94%
rename from source/tanya/os/package.d
rename to os/source/tanya/os/package.d
index 5292a8a..c472c05 100644
--- a/source/tanya/os/package.d
+++ b/os/source/tanya/os/package.d
@@ -6,7 +6,7 @@
  * This package provides platform-independent interfaces to operating system
  * functionality.
  *
- * Copyright: Eugene Wissner 2017-2018.
+ * Copyright: Eugene Wissner 2017-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/sys/dub.json b/sys/dub.json
new file mode 100644
index 0000000..8fb6d71
--- /dev/null
+++ b/sys/dub.json
@@ -0,0 +1,5 @@
+{
+	"name": "sys",
+	"description": "Low-level operating system bindings and definitions",
+	"targetType": "library"
+}
diff --git a/source/tanya/sys/linux/syscall.d b/sys/source/tanya/sys/linux/syscall.d
similarity index 98%
rename from source/tanya/sys/linux/syscall.d
rename to sys/source/tanya/sys/linux/syscall.d
index e70f75a..ccc3fee 100644
--- a/source/tanya/sys/linux/syscall.d
+++ b/sys/source/tanya/sys/linux/syscall.d
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /*
- * Copyright: Eugene Wissner 2018.
+ * Copyright: Eugene Wissner 2018-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/sys/posix/ioctl.d b/sys/source/tanya/sys/posix/ioctl.d
similarity index 98%
rename from source/tanya/sys/posix/ioctl.d
rename to sys/source/tanya/sys/posix/ioctl.d
index abd8f84..86d1465 100644
--- a/source/tanya/sys/posix/ioctl.d
+++ b/sys/source/tanya/sys/posix/ioctl.d
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /*
- * Copyright: Eugene Wissner 2018.
+ * Copyright: Eugene Wissner 2018-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/sys/posix/mman.d b/sys/source/tanya/sys/posix/mman.d
similarity index 96%
rename from source/tanya/sys/posix/mman.d
rename to sys/source/tanya/sys/posix/mman.d
index dbf78a9..24a4701 100644
--- a/source/tanya/sys/posix/mman.d
+++ b/sys/source/tanya/sys/posix/mman.d
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /*
- * Copyright: Eugene Wissner 2018.
+ * Copyright: Eugene Wissner 2018-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/sys/posix/net/if_.d b/sys/source/tanya/sys/posix/net/if_.d
similarity index 94%
rename from source/tanya/sys/posix/net/if_.d
rename to sys/source/tanya/sys/posix/net/if_.d
index e72cc04..1cb5b43 100644
--- a/source/tanya/sys/posix/net/if_.d
+++ b/sys/source/tanya/sys/posix/net/if_.d
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /*
- * Copyright: Eugene Wissner 2018.
+ * Copyright: Eugene Wissner 2018-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/sys/posix/socket.d b/sys/source/tanya/sys/posix/socket.d
similarity index 99%
rename from source/tanya/sys/posix/socket.d
rename to sys/source/tanya/sys/posix/socket.d
index 9708f04..8924a8d 100644
--- a/source/tanya/sys/posix/socket.d
+++ b/sys/source/tanya/sys/posix/socket.d
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /*
- * Copyright: Eugene Wissner 2018.
+ * Copyright: Eugene Wissner 2018-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/sys/windows/def.d b/sys/source/tanya/sys/windows/def.d
similarity index 98%
rename from source/tanya/sys/windows/def.d
rename to sys/source/tanya/sys/windows/def.d
index ea37266..84b4864 100644
--- a/source/tanya/sys/windows/def.d
+++ b/sys/source/tanya/sys/windows/def.d
@@ -16,7 +16,7 @@
  * defined here.
  * Also aliases for specific types like $(D_PSYMBOL SOCKET) are defined here.
  *
- * Copyright: Eugene Wissner 2017-2018.
+ * Copyright: Eugene Wissner 2017-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/sys/windows/ifdef.d b/sys/source/tanya/sys/windows/ifdef.d
similarity index 91%
rename from source/tanya/sys/windows/ifdef.d
rename to sys/source/tanya/sys/windows/ifdef.d
index 89e1c3f..f091427 100644
--- a/source/tanya/sys/windows/ifdef.d
+++ b/sys/source/tanya/sys/windows/ifdef.d
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /**
- * Copyright: Eugene Wissner 2018.
+ * Copyright: Eugene Wissner 2018-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/sys/windows/iphlpapi.d b/sys/source/tanya/sys/windows/iphlpapi.d
similarity index 94%
rename from source/tanya/sys/windows/iphlpapi.d
rename to sys/source/tanya/sys/windows/iphlpapi.d
index 002d2f5..37d0f16 100644
--- a/source/tanya/sys/windows/iphlpapi.d
+++ b/sys/source/tanya/sys/windows/iphlpapi.d
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /**
- * Copyright: Eugene Wissner 2018.
+ * Copyright: Eugene Wissner 2018-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/sys/windows/package.d b/sys/source/tanya/sys/windows/package.d
similarity index 95%
rename from source/tanya/sys/windows/package.d
rename to sys/source/tanya/sys/windows/package.d
index 120013f..5e9b396 100644
--- a/source/tanya/sys/windows/package.d
+++ b/sys/source/tanya/sys/windows/package.d
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /**
- * Copyright: Eugene Wissner 2017-2018.
+ * Copyright: Eugene Wissner 2017-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/sys/windows/winbase.d b/sys/source/tanya/sys/windows/winbase.d
similarity index 97%
rename from source/tanya/sys/windows/winbase.d
rename to sys/source/tanya/sys/windows/winbase.d
index 02978a3..407b6d2 100644
--- a/source/tanya/sys/windows/winbase.d
+++ b/sys/source/tanya/sys/windows/winbase.d
@@ -5,7 +5,7 @@
 /**
  * Definitions from winbase.h.
  *
- * Copyright: Eugene Wissner 2017-2018.
+ * Copyright: Eugene Wissner 2017-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/sys/windows/winsock2.d b/sys/source/tanya/sys/windows/winsock2.d
similarity index 99%
rename from source/tanya/sys/windows/winsock2.d
rename to sys/source/tanya/sys/windows/winsock2.d
index 8a00ed9..931e76b 100644
--- a/source/tanya/sys/windows/winsock2.d
+++ b/sys/source/tanya/sys/windows/winsock2.d
@@ -5,7 +5,7 @@
 /**
  * Definitions from winsock2.h, ws2def.h and MSWSock.h.
  *
- * Copyright: Eugene Wissner 2017-2018.
+ * Copyright: Eugene Wissner 2017-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)