diff --git a/gradle/gradle/wrapper/gradle-wrapper.properties b/gradle/gradle/wrapper/gradle-wrapper.properties
index 49df2ab4..16d28051 100644
--- a/gradle/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,5 @@
-#Fri Jun 22 01:12:28 EDT 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.7-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.7-all.zip
diff --git a/platform-android/build.gradle b/platform-android/build.gradle
index ed491ee3..819d8af0 100644
--- a/platform-android/build.gradle
+++ b/platform-android/build.gradle
@@ -56,10 +56,10 @@ dependencies {
 
 preBuild {
     dependsOn task( type: Exec, 'buildLibSodium', {
-        commandLine "$projectDir/../lib/bin/build_libsodium-android"
+        commandLine 'bash', "$rootDir/../lib/bin/build_libsodium-android"
     } )
     dependsOn task( type: Exec, 'buildLibJson-c', {
-        commandLine "$projectDir/../lib/bin/build_libjson-c-android"
+        commandLine 'bash', "$rootDir/../lib/bin/build_libjson-c-android"
     } )
 }
 
diff --git a/platform-independent/c/core/build.gradle b/platform-independent/c/core/build.gradle
index 4de67c83..9172673f 100644
--- a/platform-independent/c/core/build.gradle
+++ b/platform-independent/c/core/build.gradle
@@ -53,13 +53,11 @@ library {
 
         if (project.tasks.findByName('buildLibSodium') == null)
             archive.dependsOn task( type: Exec, 'buildLibSodium', {
-                workingDir file( "$rootDir/../lib/bin" )
-                commandLine 'bash', "./build_libsodium-${platform}"
+                commandLine 'bash', "$rootDir/../lib/bin/build_libsodium-${platform}"
             } )
 //        if (project.tasks.findByName('buildLibJson-c') == null)
 //            archive.dependsOn task( type: Exec, 'buildLibJson-c', {
-//                workingDir file( "$rootDir/../lib/bin" )
-//                commandLine 'bash', "./build_libjson-c-${platform}"
+//                commandLine 'bash', "$rootDir/../lib/bin/build_libjson-c-${platform}"
 //            } )
 
         project.dependencies {