Try #1303:

cabal.project

@@ -1,70 +1,2 @@
 packages:
   lib/*/*.cabal
-
-package cardano-crypto
-  tests: False
-  benchmarks: False
-
-package contra-tracer
-  tests: False
-  benchmarks: False
-
-package iohk-monitoring
-  tests: False
-  benchmarks: False
-
-package lobemo-backend-aggregation
-  tests: False
-  benchmarks: False
-
-package lobemo-backend-monitoring
-  tests: False
-  benchmarks: False
-
-package ekg-prometheus-adapter
-  tests: False
-  benchmarks: False
-
-package zip
-  tests: False
-  benchmarks: False
-  flags: +disable-bzip2
-
-source-repository-package
-  type: git
-  location: https://github.com/input-output-hk/cardano-crypto
-  tag: 3c5db489c71a4d70ee43f5f9b979fcde3c797f2a
-
-source-repository-package
-  type: git
-  location: https://github.com/input-output-hk/iohk-monitoring-framework
-  tag: b4643defabb23b3d78f4b690a01bb6a41a3cd203
-  subdir: contra-tracer
-
-source-repository-package
-  type: git
-  location: https://github.com/input-output-hk/iohk-monitoring-framework
-  tag: b4643defabb23b3d78f4b690a01bb6a41a3cd203
-  subdir: iohk-monitoring
-
-source-repository-package
-  type: git
-  location: https://github.com/input-output-hk/iohk-monitoring-framework
-  tag: b4643defabb23b3d78f4b690a01bb6a41a3cd203
-  subdir: plugins/backend-aggregation
-
-source-repository-package
-  type: git
-  location: https://github.com/input-output-hk/iohk-monitoring-framework
-  tag: b4643defabb23b3d78f4b690a01bb6a41a3cd203
-  subdir: plugins/backend-monitoring
-
-source-repository-package
-  type: git
-  location: https://github.com/CodiePP/ekg-prometheus-adapter
-  tag: 1a258b6df7d9807d4c4ff3e99722223d31a2c320
-
-source-repository-package
-  type: git
-  location: https://github.com/mrkkrp/zip
-  tag: 5a39029cebc9ad5b16ed6a5f2f495714b34b02f8

default.nix

@@ -59,6 +59,7 @@ let
         cardano-wallet-cli
         cardano-wallet-core
         cardano-wallet-core-integration
+        cardano-wallet-byron
         cardano-wallet-jormungandr
         cardano-wallet-launcher
         cardano-wallet-test-utils

lib/byron/cardano-wallet-byron.cabal

@@ -0,0 +1,99 @@
+name:                cardano-wallet-byron
+version:             2020.1.21
+synopsis:            Wallet backend protocol-specific bits implemented using byron nodes
+description:         Please see README.md
+homepage:            https://github.com/input-output-hk/cardano-wallet
+author:              IOHK Engineering Team
+maintainer:          [email protected]
+copyright:           2020 IOHK
+license:             Apache-2.0
+category:            Web
+build-type:          Simple
+cabal-version:       >=1.10
+
+flag development
+    description: Disable `-Werror`
+    default: False
+    manual: True
+
+library
+  default-language:
+      Haskell2010
+  default-extensions:
+      NoImplicitPrelude
+      OverloadedStrings
+  ghc-options:
+      -Wall
+      -Wcompat
+      -fwarn-redundant-constraints
+  if (!flag(development))
+    ghc-options:
+      -Werror
+  build-depends:
+      base
+    , async
+    , bytestring
+    , cardano-binary
+    , cardano-crypto
+    , cardano-crypto-wrapper
+    , cardano-ledger
+    , cardano-wallet-core
+    , cardano-wallet-launcher
+    , cborg
+    , contra-tracer
+    , cryptonite
+    , deepseq
+    , either
+    , fmt
+    , io-sim-classes
+    , iohk-monitoring
+    , memory
+    , network
+    , network-mux
+    , ouroboros-consensus
+    , ouroboros-network
+    , serialise
+    , text
+    , text-class
+    , time
+    , transformers
+    , typed-protocols
+    , typed-protocols-cbor
+    , warp
+  hs-source-dirs:
+      src
+  exposed-modules:
+      Cardano.Wallet.Byron
+      Cardano.Wallet.Byron.Compatibility
+      Cardano.Wallet.Byron.Network
+      Cardano.Wallet.Byron.Transaction
+      Cardano.Wallet.Byron.Transaction.Size
+
+executable cardano-wallet-byron
+  default-language:
+      Haskell2010
+  default-extensions:
+      NoImplicitPrelude
+      OverloadedStrings
+  ghc-options:
+      -threaded -rtsopts
+      -Wall
+      -O2
+  if (!flag(development))
+    ghc-options:
+      -Werror
+  build-depends:
+      base
+    , cardano-wallet-byron
+    , cardano-wallet-cli
+    , cardano-wallet-core
+    , cardano-wallet-launcher
+    , iohk-monitoring
+    , network
+    , optparse-applicative
+    , text
+    , text-class
+  hs-source-dirs:
+      exe
+  main-is:
+    cardano-wallet-byron.hs