diff --git a/go.mod b/go.mod
index 5c62e94..afcb2e0 100644
--- a/go.mod
+++ b/go.mod
@@ -25,6 +25,7 @@ require (
 
 require (
 	github.com/Clever/csvlint v0.3.0 // indirect
+	github.com/TuftsBCB/io v0.0.0-20140121014543-22b94e9b23f9 // indirect
 	github.com/buger/jsonparser v1.1.1 // indirect
 	github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
diff --git a/go.sum b/go.sum
index 7c68023..9bac5f4 100644
--- a/go.sum
+++ b/go.sum
@@ -6,6 +6,8 @@ github.com/PaesslerAG/gval v1.2.2 h1:Y7iBzhgE09IGTt5QgGQ2IdaYYYOU134YGHBThD+wm9E
 github.com/PaesslerAG/gval v1.2.2/go.mod h1:XRFLwvmkTEdYziLdaCeCa5ImcGVrfQbeNUbVR+C6xac=
 github.com/PaesslerAG/jsonpath v0.1.0 h1:gADYeifvlqK3R3i2cR5B4DGgxLXIPb3TRTH1mGi0jPI=
 github.com/PaesslerAG/jsonpath v0.1.0/go.mod h1:4BzmtoM/PI8fPO4aQGIusjGxGir2BzcV0grWtFzq1Y8=
+github.com/TuftsBCB/io v0.0.0-20140121014543-22b94e9b23f9 h1:Zc1/GNsUpgZR9qm1EmRSKrnOHA7CCd0bIzGdq0cREN0=
+github.com/TuftsBCB/io v0.0.0-20140121014543-22b94e9b23f9/go.mod h1:PZyV4WA3NpqtezSY0h6E6NARAmdDm0qwrydveOyR5Gc=
 github.com/barkimedes/go-deepcopy v0.0.0-20220514131651-17c30cfc62df h1:GSoSVRLoBaFpOOds6QyY1L8AX7uoY+Ln3BHc22W40X0=
 github.com/barkimedes/go-deepcopy v0.0.0-20220514131651-17c30cfc62df/go.mod h1:hiVxq5OP2bUGBRNS3Z/bt/reCLFNbdcST6gISi1fiOM=
 github.com/buger/jsonparser v1.1.1 h1:2PnMjfWD7wBILjqQbt530v576A/cAbQvEW9gGIpYMUs=
diff --git a/pkg/obioptions/version.go b/pkg/obioptions/version.go
index b41764f..1c22e99 100644
--- a/pkg/obioptions/version.go
+++ b/pkg/obioptions/version.go
@@ -8,7 +8,7 @@ import (
 // corresponds to the last commit, and not the one when the file will be
 // commited
 
-var _Commit = "b9bee5f"
+var _Commit = "ceca339"
 var _Version = "Release 4.2.0"
 
 // Version returns the version of the obitools package.
diff --git a/pkg/obitax/csvtaxdump_write.go b/pkg/obitax/csvtaxdump_write.go
index 9f4c3a6..c2c6a1a 100644
--- a/pkg/obitax/csvtaxdump_write.go
+++ b/pkg/obitax/csvtaxdump_write.go
@@ -1 +1,38 @@
 package obitax
+
+import (
+	"strings"
+
+	"github.com/TuftsBCB/io/newick"
+)
+
+func (taxonomy *Taxonomy) Newick() string {
+	if taxonomy == nil {
+		return ""
+	}
+
+	iterator := taxonomy.AsTaxonSet().Sort().Iterator()
+
+	nodes := make(map[*string]*newick.Tree, taxonomy.Len())
+	trees := make([]*newick.Tree, 0)
+
+	for iterator.Next() {
+		taxon := iterator.Get()
+		tree := &newick.Tree{Label: taxon.String()}
+		nodes[taxon.Node.id] = tree
+		if parent, ok := nodes[taxon.Parent().Node.id]; ok {
+			parent.Children = append(parent.Children, *tree)
+		} else {
+			trees = append(trees, tree)
+		}
+	}
+
+	rep := strings.Builder{}
+
+	for _, tree := range trees {
+		rep.WriteString(tree.String())
+		rep.WriteString("\n")
+	}
+
+	return rep.String()
+}
diff --git a/pkg/obitax/newick_write.go b/pkg/obitax/newick_write.go
new file mode 100644
index 0000000..9f4c3a6
--- /dev/null
+++ b/pkg/obitax/newick_write.go
@@ -0,0 +1 @@
+package obitax
diff --git a/pkg/obitools/obiconvert/options.go b/pkg/obitools/obiconvert/options.go
index 22684df..832f6b9 100644
--- a/pkg/obitools/obiconvert/options.go
+++ b/pkg/obitools/obiconvert/options.go
@@ -163,10 +163,6 @@ func CLIOutputFormat() string {
 	}
 }
 
-func CLICompressed() bool {
-	return __compressed__
-}
-
 func CLISkipEmpty() bool {
 	return __skip_empty__
 }
diff --git a/pkg/obitools/obiconvert/sequence_writer.go b/pkg/obitools/obiconvert/sequence_writer.go
index 8c12a7f..01f964b 100644
--- a/pkg/obitools/obiconvert/sequence_writer.go
+++ b/pkg/obitools/obiconvert/sequence_writer.go
@@ -58,7 +58,7 @@ func CLIWriteBioSequences(iterator obiiter.IBioSequence,
 	opts = append(opts, obiformats.OptionsParallelWorkers(nworkers))
 	opts = append(opts, obiformats.OptionsBatchSize(obidefault.BatchSize()))
 
-	opts = append(opts, obiformats.OptionsCompressed(CLICompressed()))
+	opts = append(opts, obiformats.OptionsCompressed(obidefault.CompressOutput()))
 
 	var err error
 
diff --git a/pkg/obitools/obidistribute/distribute.go b/pkg/obitools/obidistribute/distribute.go
index 4757a28..6d23c53 100644
--- a/pkg/obitools/obidistribute/distribute.go
+++ b/pkg/obitools/obidistribute/distribute.go
@@ -33,7 +33,7 @@ func CLIDistributeSequence(sequences obiiter.IBioSequence) {
 	opts = append(opts, obiformats.OptionsParallelWorkers(nworkers),
 		obiformats.OptionsBatchSize(obidefault.BatchSize()),
 		obiformats.OptionsAppendFile(CLIAppendSequences()),
-		obiformats.OptionsCompressed(obiconvert.CLICompressed()))
+		obiformats.OptionsCompressed(obidefault.CompressOutput()))
 
 	var formater obiformats.SequenceBatchWriterToFile