diff --git a/.travis.yml b/.travis.yml
index f1162d3e4..623e0e82b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,7 +15,7 @@ services:
 matrix:
   include:
   # Build on Linux with docker
-  - env: BUILD=stack ARGS="" PURS_OS="linux64"
+  - env: BUILD=stack ARGS="" PURS_OS="linux64" IMAGE_TAG=lts-12
     compiler: ": #stack default"
 
   # Build on macOS natively
@@ -47,8 +47,8 @@ before_install:
       echo 'remote-repo-cache: $HOME/.cabal/packages' >> $HOME/.cabal/config
 
     else
-      docker pull nilrecurring/haskell-lavello:lts-12
-      docker run --mount src="$(pwd)",target=/home/ubuntu/spago,type=bind nilrecurring/haskell-lavello:lts-12 /bin/bash -c "sudo chown -R ubuntu spago; cd spago; stack build"
+      docker pull "nilrecurring/haskell-lavello:${IMAGE_TAG}"
+      docker run --mount src="$(pwd)",target=/home/ubuntu/spago,type=bind "nilrecurring/haskell-lavello:${IMAGE_TAG}" /bin/bash -c "sudo chown -R ubuntu spago; cd spago; stack build"
 
     fi
 
@@ -82,7 +82,7 @@ script:
       stack build --test --no-run-tests --copy-bins --local-bin-path ./artifacts;
     else
       docker run --mount src="$(pwd)",target=/home/ubuntu/spago,type=bind \
-       nilrecurring/haskell-lavello:lts-12 /bin/bash -c \
+       "nilrecurring/haskell-lavello:${IMAGE_TAG}" /bin/bash -c \
        'cd spago && stack build --test --no-run-tests --copy-bins --local-bin-path ./artifacts'
     fi
     nvm install 10 && nvm use 10
@@ -113,7 +113,7 @@ before_deploy:
         sed -e "s/NPM_VERSION/$(./scripts/get-npm-version)/g" -i "" npm/package.json ;
         sed -e "s/PACKAGE_VERSION/$(./scripts/get-version)/g" -i "" npm/install.js ;
       else
-        docker run --mount src="$(pwd)",target=/home/ubuntu/spago,type=bind nilrecurring/haskell-lavello:lts-12 /bin/bash -c "cd spago; stack build --copy-bins --local-bin-path ./artifacts"
+        docker run --mount src="$(pwd)",target=/home/ubuntu/spago,type=bind "nilrecurring/haskell-lavello:${IMAGE_TAG}" /bin/bash -c "cd spago; stack build --copy-bins --local-bin-path ./artifacts"
         sed -e "s/NPM_VERSION/$(./scripts/get-npm-version)/g" -i npm/package.json ;
         sed -e "s/PACKAGE_VERSION/$(./scripts/get-version)/g" -i npm/install.js ;
       fi