diff --git a/bin/ruby-build b/bin/ruby-build
index 17de5168..3bc6cb2f 100755
--- a/bin/ruby-build
+++ b/bin/ruby-build
@@ -227,7 +227,7 @@ http_head_curl() {
 }
 
 http_get_curl() {
-  curl -C - -o "${2:--}" -qsSLf "$1"
+  curl -q -o "${2:--}" -sSLf "$1"
 }
 
 http_head_wget() {
@@ -235,7 +235,7 @@ http_head_wget() {
 }
 
 http_get_wget() {
-  wget -nv -c -O "${2:--}" "$1"
+  wget -nv -O "${2:--}" "$1"
 }
 
 fetch_tarball() {
@@ -261,7 +261,7 @@ fetch_tarball() {
     tar_args="${tar_args/z/j}"
   fi
 
-  if ! symlink_tarball_from_cache "$package_filename" "$checksum"; then
+  if ! reuse_existing_tarball "$package_filename" "$checksum"; then
     echo "Downloading ${package_filename}..." >&2
     http head "$mirror_url" &&
     download_tarball "$mirror_url" "$package_filename" "$checksum" ||
@@ -278,13 +278,19 @@ fetch_tarball() {
   } >&4 2>&1
 }
 
-symlink_tarball_from_cache() {
-  [ -n "$RUBY_BUILD_CACHE_PATH" ] || return 1
-
+reuse_existing_tarball() {
   local package_filename="$1"
-  local cached_package_filename="${RUBY_BUILD_CACHE_PATH}/$package_filename"
   local checksum="$2"
 
+  # Reuse existing file in build location
+  if [ -e "$package_filename" ] && verify_checksum "$package_filename" "$checksum"; then
+    return 0
+  fi
+
+  # Reuse previously downloaded file in cache location
+  [ -n "$RUBY_BUILD_CACHE_PATH" ] || return 1
+  local cached_package_filename="${RUBY_BUILD_CACHE_PATH}/$package_filename"
+
   [ -e "$cached_package_filename" ] || return 1
   verify_checksum "$cached_package_filename" "$checksum" >&4 2>&1 || return 1
   ln -s "$cached_package_filename" "$package_filename" >&4 2>&1 || return 1
diff --git a/test/cache.bats b/test/cache.bats
index 8c71c358..8819facf 100644
--- a/test/cache.bats
+++ b/test/cache.bats
@@ -11,7 +11,7 @@ setup() {
 
 @test "packages are saved to download cache" {
   stub md5 true
-  stub curl "-C - -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${6##*/} \$4"
+  stub curl "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
 
   install_fixture definitions/without-checksum
   [ "$status" -eq 0 ]
@@ -59,7 +59,7 @@ setup() {
 
   stub md5 true "echo invalid" "echo $checksum"
   stub curl "-*I* : true" \
-    "-C - -o * -*S* http://?*/$checksum : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$4"
+    "-q -o * -*S* http://?*/$checksum : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$3"
 
   touch "${RUBY_BUILD_CACHE_PATH}/package-1.0.0.tar.gz"
 
@@ -76,7 +76,7 @@ setup() {
 
 @test "nonexistent cache directory is ignored" {
   stub md5 true
-  stub curl "-C - -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${6##*/} \$4"
+  stub curl "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
 
   export RUBY_BUILD_CACHE_PATH="${TMP}/nonexistent"
 
diff --git a/test/checksum.bats b/test/checksum.bats
index 3c4ffc3f..5bdbf1d5 100644
--- a/test/checksum.bats
+++ b/test/checksum.bats
@@ -7,7 +7,7 @@ export RUBY_BUILD_CACHE_PATH=
 
 @test "package URL without checksum" {
   stub md5 true
-  stub curl "-C - -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${6##*/} \$4"
+  stub curl "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
 
   install_fixture definitions/without-checksum
   [ "$status" -eq 0 ]
@@ -20,7 +20,7 @@ export RUBY_BUILD_CACHE_PATH=
 
 @test "package URL with valid checksum" {
   stub md5 true "echo 83e6d7725e20166024a1eb74cde80677"
-  stub curl "-C - -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${6##*/} \$4"
+  stub curl "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
 
   install_fixture definitions/with-checksum
   [ "$status" -eq 0 ]
@@ -33,7 +33,7 @@ export RUBY_BUILD_CACHE_PATH=
 
 @test "package URL with invalid checksum" {
   stub md5 true "echo 83e6d7725e20166024a1eb74cde80677"
-  stub curl "-C - -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${6##*/} \$4"
+  stub curl "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
 
   install_fixture definitions/with-invalid-checksum
   [ "$status" -eq 1 ]
@@ -46,7 +46,7 @@ export RUBY_BUILD_CACHE_PATH=
 
 @test "package URL with checksum but no MD5 support" {
   stub md5 false
-  stub curl "-C - -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${6##*/} \$4"
+  stub curl "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
 
   install_fixture definitions/with-checksum
   [ "$status" -eq 0 ]
@@ -59,7 +59,7 @@ export RUBY_BUILD_CACHE_PATH=
 
 @test "package with invalid checksum" {
   stub md5 true "echo invalid"
-  stub curl "-C - -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${6##*/} \$4"
+  stub curl "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
 
   install_fixture definitions/with-checksum
   [ "$status" -eq 1 ]
@@ -68,3 +68,46 @@ export RUBY_BUILD_CACHE_PATH=
   unstub curl
   unstub md5
 }
+
+@test "existing tarball in build location is reused" {
+  stub md5 true "echo 83e6d7725e20166024a1eb74cde80677"
+  stub curl false
+  stub wget false
+
+  export -n RUBY_BUILD_CACHE_PATH
+  export RUBY_BUILD_BUILD_PATH="${TMP}/build"
+
+  mkdir -p "$RUBY_BUILD_BUILD_PATH"
+  ln -s "${FIXTURE_ROOT}/package-1.0.0.tar.gz" "$RUBY_BUILD_BUILD_PATH"
+
+  run_inline_definition <<DEF
+install_package "package-1.0.0" "http://example.com/packages/package-1.0.0.tar.gz#83e6d7725e20166024a1eb74cde80677" copy
+DEF
+
+  assert_success
+  [ -x "${INSTALL_ROOT}/bin/package" ]
+
+  unstub md5
+}
+
+@test "existing tarball in build location is discarded if not matching checksum" {
+  stub md5 true \
+    "echo invalid" \
+    "echo 83e6d7725e20166024a1eb74cde80677"
+  stub curl "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
+
+  export -n RUBY_BUILD_CACHE_PATH
+  export RUBY_BUILD_BUILD_PATH="${TMP}/build"
+
+  mkdir -p "$RUBY_BUILD_BUILD_PATH"
+  touch "${RUBY_BUILD_BUILD_PATH}/package-1.0.0.tar.gz"
+
+  run_inline_definition <<DEF
+install_package "package-1.0.0" "http://example.com/packages/package-1.0.0.tar.gz#83e6d7725e20166024a1eb74cde80677" copy
+DEF
+
+  assert_success
+  [ -x "${INSTALL_ROOT}/bin/package" ]
+
+  unstub md5
+}
diff --git a/test/mirror.bats b/test/mirror.bats
index 9ec45b59..96571de0 100644
--- a/test/mirror.bats
+++ b/test/mirror.bats
@@ -8,7 +8,7 @@ export RUBY_BUILD_MIRROR_URL=http://mirror.example.com
 
 @test "package URL without checksum bypasses mirror" {
   stub md5 true
-  stub curl "-C - -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${6##*/} \$4"
+  stub curl "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
 
   install_fixture definitions/without-checksum
   echo "$output" >&2
@@ -22,7 +22,7 @@ export RUBY_BUILD_MIRROR_URL=http://mirror.example.com
 
 @test "package URL with checksum but no MD5 support bypasses mirror" {
   stub md5 false
-  stub curl "-C - -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${6##*/} \$4"
+  stub curl "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
 
   install_fixture definitions/with-checksum
   [ "$status" -eq 0 ]
@@ -39,7 +39,7 @@ export RUBY_BUILD_MIRROR_URL=http://mirror.example.com
 
   stub md5 true "echo $checksum"
   stub curl "-*I* $mirror_url : true" \
-    "-C - -o * -*S* $mirror_url : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$4"
+    "-q -o * -*S* $mirror_url : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$3"
 
   install_fixture definitions/with-checksum
   [ "$status" -eq 0 ]
@@ -56,7 +56,7 @@ export RUBY_BUILD_MIRROR_URL=http://mirror.example.com
 
   stub md5 true "echo $checksum"
   stub curl "-*I* $mirror_url : false" \
-    "-C - -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${6##*/} \$4"
+    "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
 
   install_fixture definitions/with-checksum
   [ "$status" -eq 0 ]
@@ -73,8 +73,8 @@ export RUBY_BUILD_MIRROR_URL=http://mirror.example.com
 
   stub md5 true "echo invalid" "echo $checksum"
   stub curl "-*I* $mirror_url : true" \
-    "-C - -o * -*S* $mirror_url : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$4" \
-    "-C - -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${6##*/} \$4"
+    "-q -o * -*S* $mirror_url : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$3" \
+    "-q -o * -*S* http://example.com/* : cp $FIXTURE_ROOT/\${5##*/} \$3"
 
   install_fixture definitions/with-checksum
   echo "$output" >&2
@@ -92,7 +92,7 @@ export RUBY_BUILD_MIRROR_URL=http://mirror.example.com
 
   stub md5 true "echo $checksum"
   stub curl "-*I* : true" \
-    "-C - -o * -*S* http://?*/$checksum : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$4" \
+    "-q -o * -*S* http://?*/$checksum : cp $FIXTURE_ROOT/package-1.0.0.tar.gz \$3" \
 
   install_fixture definitions/with-checksum
   [ "$status" -eq 0 ]