diff --git a/eo/build_gcc_linux_debug b/eo/build_gcc_linux_debug
index da385fdb8..144a5298a 100755
--- a/eo/build_gcc_linux_debug
+++ b/eo/build_gcc_linux_debug
@@ -1,6 +1,6 @@
 #!/usr/bin/env sh
 
-mkdir debug
+mkdir -p debug
 cd debug
 cmake -DCMAKE_BUILD_TYPE=Debug ..
 make
diff --git a/eo/build_gcc_linux_release b/eo/build_gcc_linux_release
index 78a66c551..fb220d044 100755
--- a/eo/build_gcc_linux_release
+++ b/eo/build_gcc_linux_release
@@ -1,6 +1,6 @@
 #!/usr/bin/env sh
 
-mkdir release
+mkdir -p release
 cd release
 cmake ..
 make