diff --git a/before_install.sh b/before_install.sh
index aee46eced70..f3ff76fd570 100755
--- a/before_install.sh
+++ b/before_install.sh
@@ -1,18 +1,26 @@
 
+sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
+echo "deb http://download.mono-project.com/repo/debian wheezy main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list
+sudo apt-get update
+sudo apt-get install mono-devel
+
+mono .nuget/NuGet.exe restore packages.config -PackagesDirectory packages -ConfigFile .nuget/NuGet.Config
+
 (if test x-$BUILD_CORECLR = x-1; then \
   sudo sh -c 'echo "deb [arch=amd64] https://apt-mo.trafficmanager.net/repos/dotnet-release/ trusty main" > /etc/apt/sources.list.d/dotnetdev.list'; \
   sudo apt-key adv --keyserver apt-mo.trafficmanager.net --recv-keys 417A0893; \
   sudo apt-get update; \
   sudo apt-get install dotnet-dev-1.0.0-preview2-003131; \
+  (cd tests/fsharp; mono ../../.nuget/NuGet.exe restore  project.json -PackagesDirectory ../../packages -ConfigFile ../../.nuget/NuGet.Config); \
+  ./init-tools.sh;   \
+  echo "------ start log";  \
+  cat ./init-tools.log; echo "------ end log"; \
 fi)
-mono .nuget/NuGet.exe restore packages.config -PackagesDirectory packages -ConfigFile .nuget/NuGet.Config
 
-(if test x-$BUILD_CORECLR = x-1; then \
-  (cd tests/fsharp; mono ../../.nuget/NuGet.exe restore  project.json -PackagesDirectory ../../packages -ConfigFile ../../.nuget/NuGet.Config); \
+(if test x-$BUILD_PROTO_WITH_CORECLR_LKG = x-1; then \
+  (cd lkg/fsc &&  dotnet restore --packages ../packages && dotnet publish project.json -o ../Tools/lkg -r ubuntu.14.04-x64); \
+  (cd lkg/fsi &&  dotnet restore --packages ../packages && dotnet publish project.json -o ../Tools/lkg -r ubuntu.14.04-x64); \
 fi)
-(if test x-$BUILD_CORECLR = x-1; then ./init-tools.sh;  echo "------ start log"; cat ./init-tools.log; echo "------ end log"; fi)
-(if test x-$BUILD_PROTO_WITH_CORECLR_LKG = x-1; then cd lkg/fsc &&  dotnet restore --packages ../packages && dotnet publish project.json -o ../Tools/lkg -r ubuntu.14.04-x64; fi)
-(if test x-$BUILD_PROTO_WITH_CORECLR_LKG = x-1; then cd lkg/fsi &&  dotnet restore --packages ../packages && dotnet publish project.json -o ../Tools/lkg -r ubuntu.14.04-x64; fi)
 
 #TODO: work out how to avoid the need for this
 chmod u+x packages/FSharp.Compiler.Tools.4.0.1.19/tools/fsi.exe 
diff --git a/build.sh b/build.sh
index 1efdb8c2a71..290fed484f2 100755
--- a/build.sh
+++ b/build.sh
@@ -1,8 +1,9 @@
 
+# At the moment all we build is the Mono version of the F# compiler
 export BUILD_NET40=1
 
 ./before_install.sh
 
 # This is a very, very limited build script for Mono which bootstraps the compiler
 xbuild src/fsharp-proto-build.proj 
-xbuild build-everything.proj /p:Configuration=debug
+xbuild build-everything.proj /p:Configuration=release
diff --git a/netci.groovy b/netci.groovy
index 4f3c77e0b04..33229eda977 100644
--- a/netci.groovy
+++ b/netci.groovy
@@ -4,15 +4,20 @@ import jobs.generation.JobReport;
 def project = GithubProject
 def branch = GithubBranchName
 
-def osList = ['Windows_NT'] //'Ubuntu', 'OSX', 'CentOS7.1'
+def osList = ['Windows_NT', 'Ubuntu'] //, 'OSX', 'CentOS7.1'
 
 def static getBuildJobName(def configuration, def os) {
     return configuration.toLowerCase() + '_' + os.toLowerCase()
 }
 
 [true, false].each { isPullRequest ->
-    ['Debug', 'Release_ci_part1', 'Release_ci_part2'].each { configuration ->
-        osList.each { os ->
+    osList.each { os ->
+        def configurations = ['Debug', 'Release_ci_part1', 'Release_ci_part2'];
+        if (os != 'Windows_NT') {
+            // Only build one configuration on Linux/... so far
+            configurations = ['Release'];
+        }
+        configurations.each { configuration ->
 
             def lowerConfiguration = configuration.toLowerCase()
 
@@ -31,9 +36,12 @@ def static getBuildJobName(def configuration, def os) {
                 if (configuration == "Release_ci_part1") {
                     build_args = "ci_part1"
                 }
-                else {
+                else if (configuration == "Release_ci_part2") {
                     build_args = "ci_part2"
                 }
+                else {
+                    build_args = "ci"
+                }
             }
 
             if (os == 'Windows_NT') {