diff --git a/build-constraints.yaml b/build-constraints.yaml
index 81b58a17..46750a25 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -64,8 +64,7 @@ packages:
         # https://github.com/fpco/stackage/issues/541
         # - Chart-diagrams
 
-        # https://github.com/pa-ba/compdata/issues/7 GHC 7.10
-        # - compdata
+        - compdata
         - configurator
         - convertible
         - csv-conduit
@@ -169,7 +168,9 @@ packages:
         - language-javascript
 
     "Alfredo Di Napoli <alfredo.dinapoli@gmail.com>":
-        - mandrill
+        []
+        # https://github.com/adinapoli/mandrill/issues/14
+        # - mandrill GHC 7.10
 
     "Jasper Van der Jeugt":
         - blaze-html
@@ -268,7 +269,8 @@ packages:
         - distributive
         - either
         - eq
-        - ersatz
+        # https://github.com/ekmett/ersatz/issues/11 GHC 7.10
+        # - ersatz
         - exceptions
         - free
         - graphs
@@ -586,7 +588,9 @@ packages:
         - system-canonicalpath
 
     "Yann Esposito <yann.esposito@gmail.com>":
-        - holy-project
+        []
+        # https://github.com/yogsototh/holy-project/issues/5 GHC 7.10
+        # - holy-project
 
     "Paul Rouse <pgr@doynton.org>":
         - yesod-auth-hashdb
@@ -701,9 +705,7 @@ packages:
         - product-profunctors
 
     "Samplecount stefan@samplecount.com @kaoskorobase":
-        []
-        # https://github.com/samplecount/shake-language-c/issues/25
-        # - shake-language-c GHC 7.10
+        - shake-language-c
 
     "Marcin Mrotek <marcin.jan.mrotek@gmail.com>":
         - diagrams-hsqml
@@ -741,7 +743,8 @@ packages:
         - machines-io
         - machines-process
         # on behalf of Bryan O'Sullivan @bos
-        - wreq
+        # https://github.com/bos/wreq/issues/61
+        # - wreq GHC 7.10
 
     "Andraz Bajt andraz@bajt.me @edofic":
         - effect-handlers
@@ -1296,6 +1299,12 @@ expected-test-failures:
     # https://github.com/ekmett/machines/issues/42 GHC 7.10
     - machines
 
+    # https://github.com/ekmett/hyperloglog/issues/10 GHC 7.10
+    - hyperloglog
+
+    # https://github.com/acid-state/safecopy/issues/25 GHC 7.10
+    - safecopy
+
 # Haddocks which are expected to fail. Same concept as expected test failures.
 expected-haddock-failures:
     # https://github.com/acw/bytestring-progress/issues/4