diff --git a/.appveyor.yml b/.appveyor.yml
index 32ef612..6327825 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -26,7 +26,7 @@ install:
   # build nim from our own branch - this to avoid the day-to-day churn and
   # regressions of the fast-paced Nim development while maintaining the
   # flexibility to apply patches
-  - curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus/devel/build_nim.sh
+  - curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus-build-system/master/scripts/build_nim.sh
   - env MAKE="mingw32-make -j2" ARCH_OVERRIDE=%PLATFORM% bash build_nim.sh Nim csources dist/nimble NimBinaries
   - SET PATH=%CD%\Nim\bin;%PATH%
 
diff --git a/.travis.yml b/.travis.yml
index 150d83d..9ee1b9e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ install:
   # build nim from our own branch - this to avoid the day-to-day churn and
   # regressions of the fast-paced Nim development while maintaining the
   # flexibility to apply patches
-  - curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus/devel/build_nim.sh
+  - curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus-build-system/master/scripts/build_nim.sh
   - env MAKE="make -j2" bash build_nim.sh Nim csources dist/nimble NimBinaries
   - export PATH=$PWD/Nim/bin:$PATH