diff --git a/generate4.xml b/generate4.xml
index c463281..c332d2a 100644
--- a/generate4.xml
+++ b/generate4.xml
@@ -144,7 +144,7 @@
         <option value="--with-system" />
         <option value="--with-test" />
       </build>
-      <build name="secp256k1" github="libbitcoin" repository="secp256k1" branch="version8" parallel="true" nuget="true" >
+      <build name="secp256k1" github="bitcoin-core" repository="secp256k1" branch="v0.5.1" parallel="true" nuget="true" >
         <flag value="-w" />
         <option value="--disable-tests" />
         <option value="--enable-experimental" />
@@ -493,7 +493,7 @@
         <option value="--with-thread" />
         <option value="--with-test" />
       </build>
-      <build name="secp256k1" github="libbitcoin" repository="secp256k1" branch="version8" parallel="true" nuget="true" >
+      <build name="secp256k1" github="bitcoin-core" repository="secp256k1" branch="v0.5.1" parallel="true" nuget="true" >
         <flag value="-w" />
         <option value="--disable-tests" />
         <option value="--enable-experimental" />
diff --git a/templates/gsl.developer_setup.sh b/templates/gsl.developer_setup.sh
index 30e4994..fc5da95 100644
--- a/templates/gsl.developer_setup.sh
+++ b/templates/gsl.developer_setup.sh
@@ -251,7 +251,7 @@ make_jobs()
     local JOBS=$2
     shift 2
 
-    if [[ $PRECLEAN ]]; then
+    if [[ $PRECLEAN == true ]]; then
         display_message "Requested 'make clean'..."
         make clean
     fi