diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 00000000..59601858
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,50 @@
+on: [push]
+name: build
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        ghc: ['8.10']
+        os: [ubuntu-latest]
+    name: Haskell GHC ${{ matrix.ghc }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: haskell/actions/setup@v1.2.9
+        id: setup-haskell-build
+        with:
+          ghc-version: ${{ matrix.ghc }} # Resolves to the latest point release of GHC 8.8
+          cabal-version: '3.6.2.0' # Exact version of Cabal
+          enable-stack: true
+          stack-version: '2.7'
+      - name: Install dependencies
+        run: sudo apt-get install -y libxml2-utils libgl1-mesa-dev libglu1-mesa-dev freeglut3-dev libpulse-dev libblas-dev liblapack-dev libasound2-dev
+      - name: Cabal update
+        run: cabal update
+      - name: Freeze Cabal plan
+        run: cabal freeze
+      - name: Cache Cabal build artifacts
+        uses: actions/cache@v2
+        with:
+          path: |
+            ${{ steps.setup-haskell-build.outputs.cabal-store }}
+            dist-newstyle
+          key: ${{ runner.os }}-cabal-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
+          restore-keys: |
+            ${{ runner.os }}-cabal-${{ matrix.ghc }}
+      - name: Cabal build dependencies
+        run: |
+          cabal build all --enable-tests --only-dependencies
+      - name: Cabal build all
+        run: |
+          cabal build all --enable-tests
+      - name: Cabal test
+        run: |
+          cabal test all --enable-tests
+      - name: Cache stack build artifacts
+        uses:  freckle/stack-cache-action@v1.0.1 
+        with:
+          stack-yaml: stack.yaml
+      - name: Stack build and test (lts-18.21 - ghc 8.10.7)
+        run: |
+          stack build --system-ghc --test
diff --git a/essence-of-live-coding-vivid/essence-of-live-coding-vivid.cabal b/essence-of-live-coding-vivid/essence-of-live-coding-vivid.cabal
index 5786eb6a..b89041e1 100644
--- a/essence-of-live-coding-vivid/essence-of-live-coding-vivid.cabal
+++ b/essence-of-live-coding-vivid/essence-of-live-coding-vivid.cabal
@@ -30,7 +30,7 @@ library
 
     build-depends:
         base >= 4.7
-      , vivid >= 0.5
+      , vivid >= 0.5.2.0
       , essence-of-live-coding >= 0.2.5
     hs-source-dirs:   src
     default-language: Haskell2010
diff --git a/essence-of-live-coding-vivid/src/LiveCoding/Vivid.hs b/essence-of-live-coding-vivid/src/LiveCoding/Vivid.hs
index 18b27eb2..882bc71a 100644
--- a/essence-of-live-coding-vivid/src/LiveCoding/Vivid.hs
+++ b/essence-of-live-coding-vivid/src/LiveCoding/Vivid.hs
@@ -58,7 +58,6 @@ vividHandleParametrised = ParametrisedHandle { .. }
     -- Synthdef or start/stop state changed, need to release and reinitialise
     changeParametrised old new synth = defaultChange createParametrised destroyParametrised old new synth
 
-deriving instance Eq (SynthDef args)
 deriving instance Data SynthState
 deriving instance KnownSymbol a => Data (I a)
 
diff --git a/stack.8.10.3.yaml b/stack.8.10.7.yaml
similarity index 89%
rename from stack.8.10.3.yaml
rename to stack.8.10.7.yaml
index 86c2c7ae..090d3e96 100644
--- a/stack.8.10.3.yaml
+++ b/stack.8.10.7.yaml
@@ -1,4 +1,4 @@
-resolver: lts-17.15
+resolver: lts-18.21
 
 packages:
 - essence-of-live-coding
@@ -18,7 +18,7 @@ extra-deps:
 - Yampa-0.13.1@sha256:4612a2646c27bcd3ac55c90dbc34249303e28aa5b3bc3e0c6fa9ce58b889843c,5436
 - http-client-0.7.8@sha256:ed76dcd7edec3aaebe012541ca0a52594405e9b21d69420d26c0223bc4d5dc82,5400
 - PortMidi-0.2.0.0@sha256:0671e36ec72e95138bf396234b205864a8a6d0ee353e09e01cbfd57004c56f40,2383
-- vivid-0.5.1.0@sha256:fb8b2055ed3d13e267bd2d92052e659ff1a6bc11f2d9d4a753094d35204353ec,8330
+- vivid-0.5.2.0@sha256:c3b8a9994c44fe347c1ed0b0d48cd0572e71e91b793c0e2e1887afa2bb01e595,8330
 - vivid-osc-0.5.0.0@sha256:633e5c1c87633feaa26019442c3ae63946001c7afe2afa4d2cf22586bd4b182c,2786
 - vivid-supercollider-0.4.1.2@sha256:c7493f2a67b04589df8943e58a7445803e3365c6ad439603bf35695734b9bd65,1738
 
diff --git a/stack.yaml b/stack.yaml
index 664457ea..eb30fea6 120000
--- a/stack.yaml
+++ b/stack.yaml
@@ -1 +1 @@
-stack.8.10.3.yaml
\ No newline at end of file
+stack.8.10.7.yaml
\ No newline at end of file
diff --git a/stack.yaml.lock b/stack.yaml.lock
new file mode 100644
index 00000000..868d557e
--- /dev/null
+++ b/stack.yaml.lock
@@ -0,0 +1,54 @@
+# This file was autogenerated by Stack.
+# You should not edit this file by hand.
+# For more information, please see the documentation at:
+#   https://docs.haskellstack.org/en/stable/lock_files
+
+packages:
+- completed:
+    hackage: Yampa-0.13.1@sha256:4612a2646c27bcd3ac55c90dbc34249303e28aa5b3bc3e0c6fa9ce58b889843c,5436
+    pantry-tree:
+      size: 4039
+      sha256: 2ebdfafc0143a66132e1f790fc3909c93654ee89fbe468574c5c2a36070dc6b3
+  original:
+    hackage: Yampa-0.13.1@sha256:4612a2646c27bcd3ac55c90dbc34249303e28aa5b3bc3e0c6fa9ce58b889843c,5436
+- completed:
+    hackage: http-client-0.7.8@sha256:ed76dcd7edec3aaebe012541ca0a52594405e9b21d69420d26c0223bc4d5dc82,5400
+    pantry-tree:
+      size: 2459
+      sha256: 76613a317255d72133176fccb5f2da9228c36bccd9d587b8a2dd3e5a6491cd48
+  original:
+    hackage: http-client-0.7.8@sha256:ed76dcd7edec3aaebe012541ca0a52594405e9b21d69420d26c0223bc4d5dc82,5400
+- completed:
+    hackage: PortMidi-0.2.0.0@sha256:0671e36ec72e95138bf396234b205864a8a6d0ee353e09e01cbfd57004c56f40,2383
+    pantry-tree:
+      size: 1818
+      sha256: c9936666afc390560319024c25ecb184e2518ae4d3be5ae14081231091c1f073
+  original:
+    hackage: PortMidi-0.2.0.0@sha256:0671e36ec72e95138bf396234b205864a8a6d0ee353e09e01cbfd57004c56f40,2383
+- completed:
+    hackage: vivid-0.5.2.0@sha256:c3b8a9994c44fe347c1ed0b0d48cd0572e71e91b793c0e2e1887afa2bb01e595,8330
+    pantry-tree:
+      size: 3767
+      sha256: dac5c08ce0d42214067b585df487b8b4df81dad1400382cdd257c6a6dce7c941
+  original:
+    hackage: vivid-0.5.2.0@sha256:c3b8a9994c44fe347c1ed0b0d48cd0572e71e91b793c0e2e1887afa2bb01e595,8330
+- completed:
+    hackage: vivid-osc-0.5.0.0@sha256:633e5c1c87633feaa26019442c3ae63946001c7afe2afa4d2cf22586bd4b182c,2786
+    pantry-tree:
+      size: 261
+      sha256: 913a6edc636304ef5f3f92f0967b218a29fa611fdb2ba66c81a8c3b2694a3ef3
+  original:
+    hackage: vivid-osc-0.5.0.0@sha256:633e5c1c87633feaa26019442c3ae63946001c7afe2afa4d2cf22586bd4b182c,2786
+- completed:
+    hackage: vivid-supercollider-0.4.1.2@sha256:c7493f2a67b04589df8943e58a7445803e3365c6ad439603bf35695734b9bd65,1738
+    pantry-tree:
+      size: 441
+      sha256: 10fc26fdd7213c555698cf6a377434f3623af1a2af208eb5c72070b5aec568ab
+  original:
+    hackage: vivid-supercollider-0.4.1.2@sha256:c7493f2a67b04589df8943e58a7445803e3365c6ad439603bf35695734b9bd65,1738
+snapshots:
+- completed:
+    size: 586110
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/18/21.yaml
+    sha256: ce4fb8d44f3c6c6032060a02e0ebb1bd29937c9a70101c1517b92a87d9515160
+  original: lts-18.21