diff --git a/.ghci b/.ghci
index 93de23e5f..f57b21cb3 100644
--- a/.ghci
+++ b/.ghci
@@ -1,4 +1,6 @@
 :set -i.
+:set -iihp-ide
+:set -iihp-ssc
 :set -threaded
 :set -XOverloadedStrings
 :set -XNoImplicitPrelude
diff --git a/devenv-module.nix b/devenv-module.nix
index 27f364120..20d2ac6f2 100644
--- a/devenv-module.nix
+++ b/devenv-module.nix
@@ -93,7 +93,7 @@ that is defined in flake-module.nix
                     ]);
 
             scripts.tests.exec = ''
-                runghc $(make -f lib/IHP/Makefile.dist print-ghc-extensions) -iIDE Test/Main.hs
+                runghc $(make -f lib/IHP/Makefile.dist print-ghc-extensions) -iihp-ide -iihp-ssc Test/Main.hs
             '';
 
             scripts.fastbuild.exec = ''
diff --git a/ihp-ide/ihp-ide.cabal b/ihp-ide/ihp-ide.cabal
index d6ae38bb5..d3da8ab23 100644
--- a/ihp-ide/ihp-ide.cabal
+++ b/ihp-ide/ihp-ide.cabal
@@ -11,7 +11,7 @@ maintainer:          hello@digitallyinduced.com
 build-type:          Simple
 
 Flag FastBuild
-    Default: True
+    Default: False
     Description: Disables all optimisations, leads to faster build time
 
 common shared-properties
diff --git a/ihp.cabal b/ihp.cabal
index 1b02adf1a..c91375fda 100644
--- a/ihp.cabal
+++ b/ihp.cabal
@@ -12,7 +12,7 @@ maintainer:          hello@digitallyinduced.com
 build-type:          Simple
 
 Flag FastBuild
-    Default: True
+    Default: False
     Description: Disables all optimisations, leads to faster build time
 
 common shared-properties