diff --git a/ci-scripts/install-gsl.sh b/ci-scripts/install-gsl.sh
index ee502fe..fe39df2 100755
--- a/ci-scripts/install-gsl.sh
+++ b/ci-scripts/install-gsl.sh
@@ -10,6 +10,7 @@ PREFIX=$1
 
 set -ex
 INITDIR=$(pwd -P)
+mkdir -p ${PREFIX}
 cd ${PREFIX}
 PREFIX=$(pwd -P)
 cd ${INITDIR}/local/build
diff --git a/ci-scripts/install-hdf5.sh b/ci-scripts/install-hdf5.sh
index 45c0954..1788268 100755
--- a/ci-scripts/install-hdf5.sh
+++ b/ci-scripts/install-hdf5.sh
@@ -10,6 +10,7 @@ PREFIX=$1
 
 set -ex
 INITDIR=$(pwd -P)
+mkdir -p ${PREFIX}
 cd ${PREFIX}
 PREFIX=$(pwd -P)
 cd ${INITDIR}/local/build
diff --git a/ci-scripts/install-latan.sh b/ci-scripts/install-latan.sh
index e14db6e..797b07f 100755
--- a/ci-scripts/install-latan.sh
+++ b/ci-scripts/install-latan.sh
@@ -8,6 +8,7 @@ PREFIX=$1
 
 set -ex
 INITDIR=$(pwd -P)
+mkdir -p ${PREFIX}
 cd ${PREFIX}
 PREFIX=$(pwd -P)
 cd ${INITDIR}
diff --git a/ci-scripts/install-minuit.sh b/ci-scripts/install-minuit.sh
index 7770168..3c15118 100755
--- a/ci-scripts/install-minuit.sh
+++ b/ci-scripts/install-minuit.sh
@@ -10,6 +10,7 @@ PREFIX=$1
 
 set -ex
 INITDIR=$(pwd -P)
+mkdir -p ${PREFIX}
 cd ${PREFIX}
 PREFIX=$(pwd -P)
 cd ${INITDIR}/local/build
diff --git a/ci-scripts/install-nlopt.sh b/ci-scripts/install-nlopt.sh
index 67f9c99..0a73162 100755
--- a/ci-scripts/install-nlopt.sh
+++ b/ci-scripts/install-nlopt.sh
@@ -10,6 +10,7 @@ PREFIX=$1
 
 set -ex
 INITDIR=$(pwd -P)
+mkdir -p ${PREFIX}
 cd ${PREFIX}
 PREFIX=$(pwd -P)
 cd ${INITDIR}/local/build