diff --git a/dev-haskell/vector-builder/Manifest b/dev-haskell/vector-builder/Manifest
new file mode 100644
index 0000000000000..fdf9e0514f400
--- /dev/null
+++ b/dev-haskell/vector-builder/Manifest
@@ -0,0 +1 @@
+DIST vector-builder-0.3.8.tar.gz 5045 BLAKE2B 1e599a0e50102c50cd6057cf892d97f9dad7468b0e49500743bf422b8a9e085d062b9b4e13ae9bb68d3c59e6bb549e77a962fdaed91d5a3e3e5d74b8ec45a6b7 SHA512 e7ca1b6ba35aa76e16ad485cfd5e326c2b257339d2aadc57b7ce2a5ec3d5790fec99e5546ea18351cd9cbf31e7ec99c737461950acd355f62be27b53edb2be17
diff --git a/dev-haskell/vector-builder/metadata.xml b/dev-haskell/vector-builder/metadata.xml
new file mode 100644
index 0000000000000..95e22703be142
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+++ b/dev-haskell/vector-builder/metadata.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>haskell@gentoo.org</email>
+		<name>Gentoo Haskell</name>
+	</maintainer>
+	<longdescription>
+		An API for efficient and convenient construction of vectors.
+		It provides the composable `Builder` abstraction, which has instances of the `Monoid` and `Semigroup` classes.
+		
+		[Usage]
+		
+		First you use the `Builder` abstraction to specify the structure of the vector.
+		Then you execute the builder to actually produce the vector.
+		
+		[Example]
+		
+		The following code shows how you can efficiently concatenate different datastructures into a single immutable vector:
+		
+		&gt;
+		&gt;import qualified Data.Vector as A
+		&gt;import qualified VectorBuilder.Builder as B
+		&gt;import qualified VectorBuilder.Vector as C
+		&gt;
+		&gt;
+		&gt;myVector :: A.Vector a -&gt; [a] -&gt; a -&gt; A.Vector a
+		&gt;myVector vector list element =
+		&gt;  C.build builder
+		&gt;  where
+		&gt;    builder =
+		&gt;      B.vector vector &lt;&gt;
+		&gt;      foldMap B.singleton list &lt;&gt;
+		&gt;      B.singleton element
+	</longdescription>
+</pkgmetadata>
diff --git a/dev-haskell/vector-builder/vector-builder-0.3.8.ebuild b/dev-haskell/vector-builder/vector-builder-0.3.8.ebuild
new file mode 100644
index 0000000000000..5c2ac8cc49f54
--- /dev/null
+++ b/dev-haskell/vector-builder/vector-builder-0.3.8.ebuild
@@ -0,0 +1,34 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+# ebuild generated by hackport 0.6.9999
+
+CABAL_FEATURES="lib profile haddock hoogle hscolour test-suite"
+inherit haskell-cabal
+
+DESCRIPTION="Vector builder"
+HOMEPAGE="https://github.com/nikita-volkov/vector-builder"
+SRC_URI="https://hackage.haskell.org/package/${P}/${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0/${PV}"
+KEYWORDS="~amd64 ~x86"
+IUSE=""
+
+RDEPEND="<dev-haskell/base-prelude-2:=[profile?]
+	>=dev-haskell/semigroups-0.16:=[profile?] <dev-haskell/semigroups-0.20:=[profile?]
+	>=dev-haskell/vector-0.11:=[profile?] <dev-haskell/vector-0.13:=[profile?]
+	>=dev-lang/ghc-7.10.1:=
+"
+DEPEND="${RDEPEND}
+	>=dev-haskell/cabal-1.22.2.0
+	test? ( >=dev-haskell/attoparsec-0.13 <dev-haskell/attoparsec-0.14
+		>=dev-haskell/quickcheck-2.8.1 <dev-haskell/quickcheck-3
+		>=dev-haskell/quickcheck-instances-0.3.11 <dev-haskell/quickcheck-instances-0.4
+		<dev-haskell/rerebase-2
+		>=dev-haskell/tasty-0.12 <dev-haskell/tasty-2
+		>=dev-haskell/tasty-hunit-0.9 <dev-haskell/tasty-hunit-0.11
+		>=dev-haskell/tasty-quickcheck-0.9 <dev-haskell/tasty-quickcheck-0.11 )
+"